Well, a couple of things you may not be aware of. I decided to install the card into my 3rd PCI-E slot, situated between the graphics card & southbridge chipset, only to find it wouldn't fit as the end of the card was catching on the RAM clips.
The old one fitted after I had changed the RAM modules to the 2nd channels (this put the 1st module one in from the left hand slots) & dropped the RAM clip down all the way.
I compared the two cards & the new one is about 10 millimetres longer. So, if you have a Silverstone case (mine is a Lascala 14 series) be aware. I now have only one useable PCI-E x1 slot, as the 2nd one is blocked by the graphics card fan


Also, the brilliant minds at Hauppuage decided to ship the card with an imcompatible drivers' CD. Sorry, but this comapny, whilst the products are very good, everything else they do is decidely 2nd-rate! (ask people the issues they had with 150MCE drivers, a few years back).
I ended up getting the correct drivers from here.
On the HTPC front, it appears all good. I reinstalled from a very ealry image (basically just chipset drivers installed) & things are working, especially with the SAF codecs which I had issues with in my original OS install.