If you like Japanese style sticks, the Madcatz Street Fighter IV sticks are great. The Tournament Edition version comes stock with real Sanwa parts. You can also switch to Seimitsu parts later as well. The Standard Edition comes with knockoff parts, but it's built to be modded with Sanwa or Seimitsu parts if you want to go that route.
As far as American style Happ/IL sticks go, you'd either have to go with a custom built stick or Arcade in a Box. If you're handy, you could see if you could find an old Street Fighter Anniversary Stick for the PS2/Xbox and mod it with Happ/IL parts and swap in a hacked Xbox 360 PCB. You could also swap in a hacked Xbox 360 PCB into a MAS stick if you can come around one of those, too.