I use an NEC XM29+ as my primary gaming crt. If the gods play retro games then this is the display they would use. For most newer stuff I use a 56" DLP tv. For some reason the DLP doesnt seem to butcher things as badly as other LCD and plasma displays do. I keep another 20" toshiba crt around that I bought new in 2007 or so. I keep it since it seems like it was one of the lsst decent crts that could be bought new. It looks almost as good as the xm29.
I mostly run composite or svideo if its natively available. The xm29 makes even the worst composite signal look good. Additionally the xm29 is excellent for these silly Japanese PCs like the FM Towns and x68000. Ill post up some pics later.