haha, a dilema indeed. This is how i would look at it:
Samsung SM2032BW - 20"WS TN Film panel with RTC technology offering 2ms G2G response time. £176 is quite a good price. I believe the SM2032GW offers the exact same spec and is supposed to feature a panel frmo CPT...Good price, and RTC will offer improved responsiveness compared with non-overdriven panels. So it has the edge over 5ms rated 20"WS TN Film models.
Samsung SM223BW - £188, 5ms TN Film panel. Samsung claimed that the new model would only feature Samsung TN Film panels, and would not suffer from the 'lottery' of the SM226BW. However, that's yet to be really confirmed, only reported a little while ago (
link). At the same time, Samsung claimed they will now supply the SM226BW with Samsung panels, since their stock has caught up with demand....no longer do they need to use CMO/AUO panels (supposedly). However,this model doesn't feature overdrive /RTC technology and so responsiveness in practice is likely to be behind that of the SM2032BW. It is certainly behind that of the SM226BW which is the same panel (in theory, or near enough even with the lottery) where RTC was added to boost grey to grey transitions. It's a good price though at £188
Samsung SM226BW - I'd say there's probably an equal chance that these now all use Samsung panels as there is that the SM223BW uses them. I would imagine either Samsung have the panel stock of they don't. As such, i'd look at it like this is the RTC edition of the SM223BW. If you're a serious gamer then you may well benefit from the extra boost of RTC which is evident in practice if you compare a 2ms G2G TN and a 5ms non overdriven TN Film panel. The SM223BW will be more than adequate for most people though, but if you're a serious gamer, this offers an edge.
I'd suggest for gaming, you want to look at one of the 22" models really...i think i would