I don't run amp yet and i run Nakamichi CD-45Z headunit. Well, it sounds OK now, strong bass, clear highs, but usually sound quality increases after about 2 weeks of using speakers. I bought those because of good review on this board and absolutely useless setups in places like circuit city - all speakers there plays terrible. I was thinking of Polk DX9 - i am a Polk fan, but i heard that 693.3 should go fine to standard contour's places

Yeph right
I don't think adaptor plate will work - when i tried speakers on a standard place - plastic door's cover wouldn't go back - what i ended up doing is cutting sheet metal on a door and putting speakers grill's support upside down, behind speaker - it added me about 3/4 clearance, so i didn't have to cut a hole very big.