I'll be running 25's on my rear, because most of my flats were actually pinch flats, which is weird, because I'm 165 lbs, and I run at least 115 on the rear.

I have a pair of gp4000s 23mm on my racing bike. They've been great to me so far

Also, 3 a month might have been an exaggeration. It's just that time has been going really fast. But I'd say maybe once or twice a month, I'd either get a pinch flat for no apparent reason, or wake up one morning to find my rear tire completely flat. I don't ride to work everyday, but I do usually get at least 100 miles in a week.