Nashbar has some continentals on crazy sale right now. they are too slick for me otherwise I woulda just got 'em.
http://www.nashbar.com/profile.cfm?c...eid=&pagename=
twenty bucks each, i guess that could qualify as expensive but it's cheap for contis.
Performance often has big fat sales. Also try biketiresdirect.com
i always buy continentals. they are expensive but they are super strong and last years and years, even with daily hard use. and they are more flat-resistant than many tires. although I can't compare that well since it's been 5+ yrs since I've used anything else.
but if you need good cheap tires now...get em on sale, or check craigslist. Someone in the Bay Area CL was offering a pair of Armadillos...free. I dunno why.