While Altel might be cheapest, they have teh WORST service we have ever had. They came into our area a while back and took over some other company. Within 4 months they were GONE because the charges they started you with went up suddenly with no warning (it was in the contract but was NEVER told to ANYONE I know), they dropped at least every other call, and if you tried to call back you got an "out of service" message, most calls were VERY fuzzy, even on phones located IN the Altel store.
Overall, while price was good, service made it so that it was NO bargain.
We get a business rate from AT&T and pay what Abbey pays for 3 lines with NO data services at all. They sold us blackberries for almost nothing but then tried to sell us data plans for $20 per phone and were SHOCKED when we said no. The salesdude that called us (and he clearly was a "dude" cause that was one of every 5 words he said, LOL) was about as shocked as if we had walked into a store nekkid! It was funny from my end. He even asked why we had blackberries if we didn't want data services? I said because they were cheap.
Anyway, you may have good luck going to the various websites and plugging in hwat you need.