I am presuming you have the Derry tartan. It is quite striking! Of course, a family named tartan is undoubtedly as handsome.

Is your kilt going to be for regular wear, or is it for special occasions? That will make a bit of a difference to accessories. However, from advice received here my plain black sporran with simple strap and chain, a few pair of hose (charcoal, bottle green and blue), and plain maroon flashes kept me nicely attired while the rest of the kilted wardrobe came together over time. The rest I already had; plain shirts, ties, a good pair of shoes and even a shorter cut suit jacket that would do in a pinch (very few times). I did get a belt with the kilt, but find I don't wear it very often.