LSx FD RX7. Sub 3000lb w/driver(normally), perfect weight distribution and able to stuff proper sized(285's/315's) meats at all four corners to detach retinas in the twisties. Can fit any of the LSx family of engines, accommodate superchargers, single or twin turbos etc... Either the older T56 6spd or the newer TR-6060 6spd transmissions can be used, multi-disk clutches, mustang 8.8 IRS out back.
Swapped FD's range from $15k for a basic N/A LS1/T56, needing some cosmetic work(paint, interior plastic parts).
$20-30k for a super clean version with a better engine(modded LS1, LS6 etc), full suspension(coilovers, bushings, STB's etc), full wheel/tire setups(big $ Volk/Work/BBS rims etc) various body kits and new paint.
$40k+ for one that's fucking insane(1000rwhp etc) in addition to the above cars parts lists/condition.
Want to screw around on weekends with 400rwp@2900lbs or blast over 200mph at the Texas Mile in something insane, you can do any of it. Plus you get to royally piss off all the die hard rotorary engine purists at every car meet, almost as good as tasting liberal tears.
"Norotors" is the only forum you'll need for these.