Whats the best HDTV Tuner to purchase?

That depends on what your trying to receive, What operating system you have, etc. If all you want to receive are ATSC terrestrial channels then you really don't need to get a tuner with QAM or NTSC capabilities, or a tuner with separate A/V inputs. Do you need a remote control? If not then you may want to opt for one that doesn't have the remote. There are many tuners that have many different options. You will need to figure out what your needs are and then find out which tuner is best for you. You can always ask your sales rep for assistance if you are unsure.