"think I've narrowed down what sort of thing I'm after. I enjoy the fast dance stuff, and I like my celtic stuff as well."

Grand, you should do well!
A poor quality YouTube here of one contemporary folk outfit which fits that bill: http://www.youtube.com/watch?v=7yiWHm_rHo8
Of course the farther you venture into "modern" styles, the less some quarters will consider it "folk".
Not that that's an issue down here in BS mind you..