I know some people have had problems with scottishkilts.net, but I'm not one of them. I've ordered a few things from them (including my wedding outfit!) and I've been happy with the service. They are a bit slow on the uptake sometimes via email, though.

I'm about to order the three button tweed jacket with waistcoat once our security deposit refund check clears the bank. I'm seriously considering adding the 5yd Irish-American kilt to it.