I don't plan on getting a 360 anytime soon. Although X-Box arcade has the original Banjo Kazooie games, it just wouldn't feel right to play them on a console not made by Nintendo. I'd rather buy the N64 versions on eBay (If I ever get a PayPal account).
If I get the chance, I'll try a store demo, but I won't be able to form a solid opinion, since I've never played the first two.