Samsung Omnia 2 i8000 issue!! Pretty please help!!

[Shell0407]

I recently got the Samsung Omnia 2 and I am having nothing but issues with it. My main concern is that it has a serious delay with everything I do, especially texting, it takes about three minutes JUST to open a message, I often have to stop it from going into sleep mode while I am waiting!!! It came with Opera mobile but it doesn't seem to work as well as what I had on my HTC touch (that phone was modified by someone who had the help of this site).
I'm looking for a software upgrade or applications that will help or just a way to completely overhaul the phone and make it my own.
I am mildly savvy with this stuff but I am LOST with what to do with this phone. If anyone could help me I will be forever grateful!!!
Thanks much!!
Shell