RHoppe,
Ive got an 05 with 4. 10's, auto and 315's and love them. I have no power issues even though I don't tow that heavy. I don't know what you tow but if you do tow heavy you might want to reconsider on the 315's but if not I would go with them cause I think you'll be happier. The truck has a great amount of power while towing with this set up so I don't think it's gonna affect you that much. The only thing I did notice more than anything is that coming to a stop took a little longer but other than that it's a good thing.
Ive got an 05 with 4. 10's, auto and 315's and love them. I have no power issues even though I don't tow that heavy. I don't know what you tow but if you do tow heavy you might want to reconsider on the 315's but if not I would go with them cause I think you'll be happier. The truck has a great amount of power while towing with this set up so I don't think it's gonna affect you that much. The only thing I did notice more than anything is that coming to a stop took a little longer but other than that it's a good thing.