About 3 months ago I had an indash XM radio installed (Alpine). Along with the head unit, I had the Terk XMicro2 antenna installed on the roof of the car. After about a month, the antenna was shot. I was unable to get any signa where before I never had any drop outs during my normal 45 minute commute (one way). The installer said it was probably just a bad antenna and replaced it. That was a month ago and now the new antenna is going south fast. In another week I think it will be as useless as the first. I really love the radio and want to get something that works. However, I want something that lasts. What antennas would you recommend?