sda or t809

[Carne]

I just bought the samsung t809 from t-mobile for 250-prepaid, the sda was also there for same price. I have 14 days to xchnage if i want. Should i stay with samsung or switch to the sda or any other phone at T-mobile equal or leser price?

edit:
I want a megapixel camera, dont really care about looks, features are what count, i dont talk on the phone alot