Wow!!
Ok so I was fine with the stock message app, figuring it's just messages, who cares. After reading this thread I got Handcent. WOW! It's soooooooo much nicer with the popups, it's actually a lot quicker loading the chat windows, which you DON'T have to do every time because of the popups anyway. It really makes a world of difference if you text a lot. The customizations like the bubble color/text background pictures, etc. make a world of difference.
Message windows are something I never thought or cared about, but after getting Handcent, there's no way I'm going back to the stock messenger.
Thanks guys!!!