I hear API and Red Sea make some pretty decent test kits.
Lamotte, I've heard a lot of and I hear its the best but the price sure shows for it. I don't know if its worth it, but I suppose it depends on the person in question.
Don't buy them from your LPS, unless of course the price is right, which I've seen most of the time it isn't.
I got my full API test kit on Dr Foster's site for 20 something total? In my LFS it was 30 something, tax not yet accounted for too.