How about this ensemble?

[Nathan]

It works for me Nathan. The sporran is a tad ornate for day wear and you will of course remove the bonnet when indoors. Enjoy the concert, the soft seats and the company!

The concert is at night so I stepped it up a little regarding the sporran. Isn't that the time when you'd wear a semi-dress? Just trying to find the right place to wear this sporran as I'm rather fond of it.

[Jock Scot]

If you want to wear that particular sporran then do so.

However just so you know this "semi-dress" thing is really not helpful as it really ends up as too much for one event and not enough for another and that situation stands out a mile in neon lights for whichever guise it is used in. If it were me, and it is quite obvious that it is not, I would retire, permanently, the semi dress sporran and wear the black leather one for all events other than formal evening events. It does then, make your dressing options so much simpler.

[M. A. C. Newsome]

The concert is at night so I stepped it up a little regarding the sporran. Isn't that the time when you'd wear a semi-dress? Just trying to find the right place to wear this sporran as I'm rather fond of it.

That's the thing about these "semi-dress" sporrans. They are really neither fish nor foul, so it can be hard to find the right occasion to wear them. But I suppose an evening concert such as you are attending is about as close an opportunity as you will find. It might look a little more congruous with the outfit if you were wearing a black barathea Argyle jacket rather than the grey one in the photo. But we are just picking at nits at this stage...

[O'Searcaigh]

In my opinion -- which is worth less than the paper this post is written on -- whatever one calls the sporran (dress, semi-dress...) it stands out a bit too much, draws too much attention (as is obvious from all the attention it has gotten here) and detracts from the otherwise over-all great look of the rest of it all. Wear the bonnet if/when out-of-doors but definitely remove it otherwise!!! Otherwise, ' Looks Sharp!!!

[Domehead]

I think it is well done. My opinion on the application of "Day wear", "Evening wear", Morning wear" are different than others.
I think your "Day wear" is fine because you are attending a concert in which a tuxedo is not required. Effectively you are wearing a nice professor's suit but replacing the slacks with your kilt - and its accoutrements. I like the contrasting waistcoat and jacket. You'll remove your bonnet upon entering. As for the sporran, it is not my place to say because how do I know it is not the sporran you were bequeathed by a late uncle? You may wear this all the time, except for black-tie when you may wear horse-hair. Who knows?

I wear a traditional antler-handled sgian no matter what the level of dress, because it is the sgian my grandmother gave my father, she then gave me prior to her passing. I have never, be it in the States or in Scotland, been asked.

As for your sporran and the "day", "semi", "dress" pickle...
Whenever (no matter the time) I attend any function that requires coat and tie, I wear my custom Wyvern Leather sporran.
Whenever (no matter the time) I attend any function that requires coat and tie, but the function is deemed by third party as "significant", I wear my custom L&M Highland chrome cantle, tartan faced Hunting sporran
Whenever (no matter the time) I attend any function that requires tuxedo I wear my custom Lamont chrome cantle, red fox Full-fur sporran.

[tulloch]

That's a great look.

[Spartan Tartan]

I think you look very nice. I would also skip the headgear, but that is just a personal preference. Also, if you like the sporran...wear it. I have a plain black leather sporran and a dress sporran. Never found a need for the semi-dress type. They always seems just a tad off for my style (slightly too dressy or not dressy enough).

I am sure your girlfriend will be pleased.

[MacRobert's Reply]

The "semi-dress" sporran seems to be a fairly recent hybrid invention that inhabits a kind of nether world between day and formal wear. Having said that, a few older day-wear sporrans do have metal catles and a few also have seal-fur fronts but the silver and fur together do suggest a formal-wear sporran. The leather tassels are more typical of day wear. As Jock suggests, a simpler sporran would be more appropriate but IMHO you could get away with this one if you prefer it.

[creagdhubh]

Very smart! Well done.