Palm Treo 700p

ok so right now i have a blackberry 8830, and i have had nothing but problems. from the when the trackball stopped working, to when i make calls i have to go into the wireless manager and turn off the wireless network and then it makes the call. Im on bb number 4, and im debating whether to get this or wait for the 755p, can someone help me out and explain to me the differences, thanks for the help!