...have you played the sequal? dragon sabre? im thinking i will get that one also
Spirit is a solid arcade port, Sabre just takes it up a notch on graphics and game play. Like roflmao says, the first one should be had on the cheap but the sequel might be in the $25-30 range. I enjoy both.
You have a CD system, Y's 1/2 is a great ride (I would even go so far as to say a must play for any Turbo CD owner).
Fighting Street is not worth the shipping IMO. Wait for a Super System card and get Flash Hiders if you want another fighter(Asuka and VG are other options). SF2' is the best mainstream 2d fighter you're gonna find on Turbo.