Richard,

I'd say it all depends upon whether you'll ever want to appear to be 'authentic', especially at formal Scottish events or whether you simply want a smart jacket to wear with your kilt.

Personally, and perhaps because of my Scottish blood, I'd opt for the real thing - or go without! I have three tweed Argylls (for semi-formal wear), a black barathea Crail, a ditto Prince Charlie and a green barathea Montrose Doublet (for formal wear). When dressing casually, anything goes - as long as it's not going to interfere with the swing o' the pleats!

If you are comfortable with your new jacket, then that is all that really matters. As for the cuffs, etc. My advice would be to keep everything to a minimum to begin with. You can always have the fancy bits added later if you feel the need.