I really wish I could come in here and definitively state whether the SC3 Hori has a Sanwa stick or not. But I can't. I've been so busy that I even stopped reading SRK for the past two weeks.
They are calling it the SC3 Real Arcade Pro, and Play Asia is charging the same amount of money for SC3RAP and the original HRAP, so I'd wager that the chances of a Sanwa JLF in there are very good. But I don't know.
If it does have a JLF, then you've got a nice, large PS2 unit with a great joystick in it. 90% of those interested in buying it most likely have SF3 on Xbox Live in mind, and that takes a convertor, which is something that I refuse to use and give guidance on.
Personally, I have my own snobbish reasons for not wanting to use that stick, Sanwa or no, but I doubt many more of you care to hear them. I bears mentioning though, that, as someone very devoted to arcade sticks, I turned my Tekken 5 stick into a HRAP, and I have never - ever used it.
With a JLF inside, the HRAP series is about as good as you can do in an off-the-shelf stick, but they are not the best by any means. Quality parts get you in the door, but versatile functionality wins the night.