I personally don't have (nor have I ever seen or played with) a Coolsat 7100, so I can't recommend it based on experience (I have none). However, from what I've heard, it is very similar to the Visionsat IV-200 (the Coolsat 7100 uses a rear USB port instead of a front panel port like the Visionsat). You may also want to check out
SatelliteAV's line of GeoSat DVR receivers, as Brian was involved in the development of the Visionsat.