You'll need one of the 18,953 jacket choices which have recently been discussed, some top-quality hose (PM me if you want me to make them for you), you'll need either ghillie brogues, buckle brogues or some other kind of shoes, flashes/garter ties, maybe a tie in the tartan colors, some kind of hat (I recommend a Balmoral), possibly one of the oft-heatedly-debated plaids, a brooch for said plaid, a sgian dubh, at least 46 sporrans, and a clan badge. Oops, I forgot the kilt pin.

I think that's about it.

By the way, the last time I spoke with Prof. Newsome, he accepted half of the payment up-front and the other half when the kilt is finished. I can't speak for him, but if that option is still available, it takes some of the "sting" out of the purchase price. You've made a wise choice in your selection of kiltmaker; just be prepared for a long wait. Quality is worth the wait!*

*That does not mean that other kiltmakers who produce kilts faster do not do quality work.