I'm considering buying a TiVo HD DVR. I've seen Moxi's new [non-cable company provided] HD DVR on the internet though. The Moxi HD DVR seems more expensive than TiVo's HD XL DVR(which I have considered,but would rather go with the HD DVR & add an external hard drive),but there is no monthly fee. TiVo is cheaper,but you have a monthly fee(I'd rather just pay up front for the whole year). Anybody familiar with both DVR's have any advice. I'd be using either DVR with a Cablecard & Charter cable.