I've had my iPhone 4 for a year now and it's hands down the best phone I've had, pretty shocked how durable it is, I'm very hard on phones and this one hasn't let me down yet...
I've waited the evo since it came out but I can't see spending money if I don't have to (unless its for the truck) and I deploy at the end of the year so when I get back I will get something new
Good luck with the evo I know a bunch of people that have them some are ok but most get replaced or fixed often. My wife and i both have Samsung Captivate's and love them no problems. There are many new android phones coming out soon that are bigger and better and it would be really hard for me to choose again.