So, I am a long time TiVo user, and my Series2 40hr just died. Anyway, I recently got DirecTV and am looking at the R10 and the R15. I've heard nothing but negative reviews about the R15, so I am skeptical to say the least. I'm interested in everyones opinion on if I have a choice, which unit should I get, the R10 or the R15? Much Thanks.