Comet online were selling the PS2 for £1300 new, but I think they're all gone now. I bought a graded one from RW and had similar concerns to you, but after reading several reassuring posts here, I decided to take the gamble and have no regrets. My main concern was cosmetic damage; but mine (as with others' here) was unmarked and as packaged as new, and of course they come direct from Sony with their standard 1 year guarantee. The fact that these graded models have been recently re-inspected and calibrated by Sony engineers should mean that you are in fact less likely to get a troublesome model than by buying new.
The PX2 only has one viewing mode: 100Hz digital plus. The PS2 has DRC-50, DRC-100 and plain 100Hz. DRC-50 quadruples the image resolution and gives stunning, film-like results. None of these 3 modes exhibit any kind of processing artifacts that plague other 100Hz sets as the processor employed can clearly keep up with any image thrown at it.
Another feature I forgot to mention is the service menu option to switch on MPEG noise reduction. I find this invaluable for clearing up blockiness and mosquito noise found in poor Freeview broadcasts without adversely affecting image detail.
The ability to use the PS2 as a centre speaker was actually a major selling point for me as finding a convenient parking space for an external centre is difficult with RPTVs. I ditched my previous Mission centre with no discernable loss of sound quality; in fact I think dialogue is actually clearer through the PS2's speakers. I guess it depends on the quality of your existing centre, although my front Dynaudio Audience 50s and REL Strata sub are not embarrassed by this company.
Granted, Picture and Picture is a bit of a gimick. But it's handy for keeping a eye on sports when there are a couple of things on at the same time. Case in point was the climax to last season's SPL race where both the Celtic and Rangers games were shown simultaneously on BBC1 and BBC2. You can zoom either of the images up or down and even listen to the other programme through the headphone socket.
It's a difficult decision, but I firmly believe the PS2 is a superior tv. The only thing letting it down is the single RGB capable scart as opposed to the PX2's two. Tosh owners will point to the lack of component inputs (and prog scan capabilities), but I find it hard to imagine that I could beat this tv on looks and image quality or size for the money. Those extra 2 inches over a 42 do make a difference. In my opinion, this tv is only surpassed by high-end Panasonic or Pioneer plasmas, but even then you sacrifice connectivity and other conveniences, and of course they cost much more £££.
Convinced yet?