Ok, new here. We are interested in upgrading our Tivo/DVR to the 100 hour one thru DirecTV. However, the more I read up on the R15 non-TIVO model they will be sending me, the more I dont want it. Not sure I have seen a piece of equipment so resoundingly rated poorly. If I buy a non DirecTV model: 1) which models are best, and 2) is this an easy DIY swap out (ie unplug current one and plug in new one) - or are there a bunch of setup nuances? Thanks! Any caveats and insights are appreciated!