OLED will be ridiculously expensive if it comes to market as a PC desktop product in any reasonable strength. Now if you're willing to spend $1000+ on a very nice monitor at the end of the year, then _maybe_ hold out till then.
If you still have a CRT now chances are you are NOT an enthusiast and therefore not into spending that much money on your PC components. I'd recommend getting yourself into a 24" LCD with decent stats. (1920x1200, low refresh rate) Perhaps a Samsung or a Dell would suit you nicely. I think they are around $450 now, but maybe you can find a deal.