You have Hokuto no Ken, but check out Dolphin Blue and NG Battle Coliseum.
Those are the only 3 I really care for. If you're going to shell out the cash for SamSho6 or KOF XI, you might as well just get an older MVS version, It'll be a fraction of the price, and Playmore didn't upres the sprites for AW anyway.
Haven't played Slug 6, so I can't tell if it's worth it's price tag.