I run a032's on my 911. Not as good grip as the Kumho's, but they should last you a season (you didn't say what a season means for you) so they're easier on the wallet.
I know someone who swears he got over 5,000 miles out of a set of ao32's on his street legal 911sc race car. He drove to the track, raced(time trials not auto-x) and drove home on them b4 he bought a trailer, so most of those miles were freeway driving from Long Beach to Button Willow or Palmdale - say, 500 freeway miles for every 100 track miles.
john
P.S. I'd be interested in hearing any feedback on the Falken's as a dirt cheap street tire.