Hi - this is my first post, and I'm looking for some advice or guidance on what DVD features to look for. I don't want to pay for features I won't benefit from because the rest of my equipment isn't good enough to notice the difference, but I don't want to miss out on important features either. I'm not an audiophile or even an enthusiast yet, so I don't really know what I'm doing, and have mostly been buying based off buzzwords. I hope I've done OK so far. I've been bargain hunting at UBID. This is what I've got so far: PIONEER ELITE VSX33TX receiver - DTS AC3 THX Select JBL PSW-D110 150w Subwoofer 4 Wharfedale Diamond 7.2 bookshelf speakers Wharfedale Rubiance Center Channel Toshiba 36" cf36g40 TV Questions: 1. I see a lot of talk about progressive scan DVD's, but with my standard TV will there be any benefit? 2. Will every DVD be Dolby DTS compatible or do I need to look for that? Or does my receiver perform that function? 3. Should I be worried if a DVD player is THX certified? Thanks. Any advice welcome.