Let the hive mind of Engadget get that for you.
"I own an iPhone 3G and I'm looking for a decent speaker / alarm clock for it. I am going to listen music in a mid-sized room, so I want nice quality speakers with solid bass. I also want to use it as an alarm clock, so it would be great if there is such a feature. The price can be low-mid to mid-high range. I was looking at the Klipsch iGroove SXT; it's powerful, slick and the reviews are good, but it doesn't have an alarm clock feature. It's no deal breaker if I can set it up from the iPhone, but I'm not sure. Thanks!"
They use Sprint's network, but yeah, it sucks. I used their cheapest Nokia phone for a while during high school because I didn't use it that much, but it barely got signal anywhere and often calls wouldn't actually ring although the other party would hear ringing and five minutes later I'd get a missed call. Ugh.