I've never tried that model, need to check out the specs for it first. I never usually use a screenmode of more than 640X512 (mostly 640x256), I'll dig around and see what I can find out about, but I'd be very surprised if it has no motion blur at all, as even Panasonic with their 600Mhz TV's have had to admit that despite the latest engine they use, motion blur has not been completely eliminated yet... 
Hm, have you also tried LED displays?
I got a Samsung Syncmaster BX2235 and I have little to complain about. Granted, it does not have the absolute blackness of the OLED display of my GP2X Wiz, but the picture is awesome, and I haven't noticed any motion blur (unlike on my Samsung LCD tv).
But then again, I haven't used a scandoubler on it and maybe that's exactly what's to blame, the internal scandoubler of LCD tvs being of poor quality.