Mk3 Supras are not hard to find parts for, but the MA70 3lt turbo's have a reputation for blowing headgaskets. If this has been rectified they're a great car. Not laggy - it's a 3lt with lots of torque potential, but the engine desgin is damn old and they're getting long in the tooth. N/A 3lt are OK too, but not world beaters.
Pick of the bunch is the jza70 - powered by a 1jz twin-turbo. Excellent engine and great car - hard to find as manual though but well worth it.
The runt of the litter is the GA70 - powered by a 1g-gte twin turbo. These are laggy and slow because they don't have enough torque to lug the supra body around. OK once they get moving (4000 rpm plus) but not really a "performance" car. Usually a bit cheaper than the MA70 and a lot cheaper than a JZA70.
I'd be inclined to get a Soarer with the 1jz twin turbo engine. Lots more "seat of the pants" punch than the V8, and are the sportiest of the Soarers. Still, a GT/Lux car rather a sportscar. But 5-speed manual's are pretty rare.
Still, for what you want there's plenty of local cars around that have already been imported - don't bother importing one yourself. Plus imports are more expensive to insure.