I am speaking as an owner of an Hauppauge HD PVR so here are some things you should know.
1. Prices start from £150/210$(yes it's expensive, but you get what you pay for).
2. Once you can record, don't turn your HD PVR off. Or it will take a while to get the resolutions back and you'll find yourself constantly restarting said HD PVR and PS3 until you get a signal again.
3. The program that comes with it, Total Media Extreme, is a joy to record with. Extremely simple and works very well.
4. It records in .TS which is
very space consuming, so make sure you have about 50GB of space to spare.
5. Hauppauge and Arcsoft's customer support centers(email) are very responsive. Within 24 hours for me.
6. When you start recording, change your Bit Rate from (default) to 8.0MB to save space at the cost of very minimal quality difference.
7. You don't play through HDMI cables you play through HD Component cables, so you're only capable of playing in 720p.
8. When all of the above is sorted, you're going to want to find some good render settings for Sony Vegas(w/o rendering in Vegas, quality FAILS). I recommend JX23's.
Hope I helped!