I have a 35 hour model DVR from 2004, which i will be upgrading from. Does D* have different recording capacity on different DVRs ( i know about the HD being able to record 300 Hours I believe). I saw on the D* website that there is the DVR that records up to 70 hours and the DIRECTV Plus DVR which claims it can record up to 100 Hours? Im confused, there appears to be different DVR models. Is there a 70 hr and a 100 hr DVR also? Who here knows about this and/or has the various models?