Are you wanting tires to just drive on, or are you wanting a performance tire?
I'm in a similar predicament, and I'm looking for 275's for my 18x9's. You can pick up 4 275/35-18's for under 800 bucks if you shop around. I've been looking around tirerack, and you can get bfgoodrich g-force sports for like 165. Those aren't some bad tires at all.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD