Phone plans

Currently i have a pay as you go plan and i have like it since I've gotten it. Generally i would spend around 20 pounds every 1 1/2-2 months. But it seems that I'm spending way too much due to calling people a lot more. Last month i spent around 30 pounds so I'm figuring that i might as well get a plan. It looks like most plan I'll be able to get a free phone. I've been asking people for suggestion. Now I've learned that nobody is happy with their total package. They either hate their phone but like their plan or the other way around. I think I'll go with t-mobile just because i do like their service. I'm trying to figure out everything and its driving me crazy with all the differnt plans and different phones. I think i want a phone that allows you to play mp3. Do i want a better camara phone? Do i want one that i can check my email with? What do i want?