"wicked clown", you have clearly never driven an R31 Skyline of any spec. The RB30E has an addictive torque curve that has to be driven to be appreciated.
The chassis isn't really stiff enough for oversteer (maybe the HR31 coupes but definately not the sedans), but once you get used to the snap tendency of the LSD it becomes a safe (and fun) car to throw sideways.
R32 GT-R for fifteen grand? Pffft - shows what you know.
And you wouldn't get an n/a 4.0L Falcon to pull 13s unless it was race spec'd. Flat to mid 14s at the most. DaddyK, turbocharging the Falcon 4.0L proves to be a bitch (read: possible but expensive, wouldn't do it for under $15k)- even though the compression ratio is suited to a forced induction application (as well as the stroke); you'd be better off getting a s/c kit. XR6: $7500; Mods: $7500 (incl. a vortech supercharger running a low boost set up) and you've got yourself, like you said, a 13 second ride.
"wicked clown", there are WRXs to be found for circa $15k. You need only to look, champ. I went to one site and found 2 straightaway for around $15k - early models, of course, like I originally said - but WRXs nonetheless. And they weren't suss examples, either.
Take a look. I bet I could talk that bloke down to $15k - he's desperate. Word the email correctly and bam, a great WRX for $15k. Don't like wagons?
Here's a sedan - although the mileage is too high for my liking. Not the point - it's under $15k and that's whats important.