OK boring answer--Specialized Armadillos. They make it right at your price cutoff with my Transportation Alternatives discount. The only tires I've tried that last 3+ months on my commuter bike. Tried vredestien, michelin, conti, bontrager, etc. those were all more like six weeks (around 900miles/month, rarely skid).

they're like jeans... there are lighter options but...

I wonder when different people consider themselves ready for new tires. I go until I get several flats in a row or more than say 3 in 10 days... although I'm not scientific about it, more like I get a bad feeling looking at them & I keep being late to work.