Im planning on getting the cab that people are using here, as it appears nice and is way better priced than the hard cabs, and of course way lighter. Im tryin to stay decently in budget so my question is, has anybody used any of the 12 volt cab heaters like on Ebay? I have seen the $300 units, but I was wonderin how good these $60-$70 units that jus plug in are? I wanna keep it all under $1000. Any input would be greatly appreciated guys!!