Except you're losing a lot of speed. Trust me. Stick with the 500 GB Seagate. It uses the largest platters on the market, making it one of the fastest standard drives out there (the Samsung Spinpoint F3 is the other).
How could a 750 GB drive have 500 GB platters? Does it have 1 500 GB platter and an extra 1/2 platter? The 500 GB platter drives are: Samsung Spinpoint F3 500 GB and 1 TB, Seagate 7200.12 500 GB and 1 TB, Western Digital Caviar Black 1 TB (the 6 GBps model) and 2 TB.
As for that "TV tuner", that's not a TV tuner. That's essentially a DVR without a HDD. I presume it works, but have no real idea. The best bet would be to contact your service provider and ask about tuner cards. Or search for how to transfer files from a DVR to a PC.
Ah! well thanks for the advice! figure i will think of more to ask later....gotta research tv tuners more...
There is supposed to be a product coming out in the near future that will work with premium channels, but I haven't bothered to track it down myself, as I'm not in the market for a tv tuner. You should be able to find some info by googling, however.