I listen to a lot of music, but the car is just not a good environment. Especially my truck, as right behind me is a wall. So I don't really don't feel a need to crank my music; I listen at a very conserved level. Currently, the setup is 35w x 4... I'm going to get Sirius and use my MP3 Player primarily... ocassionally I will want to turn it up louder; I'd say never exceeding yelling level. Is is the power I have now fine? Moving on, for Sirius, I was thinking instead of a head unit and a sirius reciver, I just get a head unit with an AUX in and a plug and play unit, and just drill the base into the dashboard (and sell the truck with a unit... that really wouldn't depreciate the truck's value, right?)... what sirius unit should I get, and which head unit(s) (needs an AUX in, no more than $150, maybe?) should I shop for?