you're on androidcentral.com, what do you think we're gonna recommend?
anyway, the pre is a great phone, i used to have one, but it's a little stale and dated. the OS is awesome, but right now the platform isn't going anywhere. Maybe next year when the HP buyout has time to bear fruit.
I personally don't like iphones because of apple's way of doing business (the walled garden) and itunes.
I've sold many Aria's to people and think it's a great phone. It's very fast (considering it's a midrange android device) and well built. I have no problem recommending this phone.
One other option (depending on your budget) would be the Captivate. It's faster than the Aria (or IPhone, or just about any other phone), has a 4" screen, and looks awesome. It just came out today. If the Aria is too small for you then the Captivate would be perfect.