I'm currently using GoSMS. The reason why I like it is because of the scheduled text messages.I dont bother with anything else but the default messaging program with my conquer.
If there was a better SMS app for Android (that allows me to send scheduled texts and a few fancy stuff), then I might consider using that instead.good point...
I'm currently using Handsent because I can't change the colors of the default messaging app without rooting my phone. The program is pretty good.
As a side note: I would just keep an eye on what apps you having running on the phone vs your SD card. Move apps to your SD which don't require resident memory?
Wow, Handcent on iPhone require jailbreaking.