I recently purchased and returned a TiVo Premere unit due to poor receiption and decided to build a HTPC for about the same cost as the TiVo, extended warranty and lifetime subscription. My initial tuner card test with the HTPC is a Win TV HVR-1250. I intentionally went with a singe tuner card to avoid signal splitting losses found in multiple tuner cards. The HVR-1250 has similar sensitivity as the TiVo, maybe even worse so I'm still looking for a better card.
Of Course I can start throwing antenna arrays at my system (and I most likely will) but it makes sense to start with the most sensitive tuner first. I'm located in the San Emigdio mountains (93222) and from my home I almost have line of sight to the transmission tower that is about 55 miles in the foothills of the the Southern Sierras mountain range. The antenna is a single 91XG. It will lock on most stations most of the time but the weaker ones (at a different tower) are very intermittent. My original plan was two tuner cards each with a seperate 91XG aimed at the appropriate tower.
Sorry for the long post. Does anyone have a suggestion for a tuner card with great sensitivity like my Samsung TV?