TFT screens are fine these days for gaming... as long as you buy a good one.
My 18.1" Iiyama AS4636D (I think it is) is what I use for my Amiga (Voodoo III/Prometheus), Amiga native, Amiga One, PC, SPARCstation 2 and 3DO... it has DVI input, SVGA input (the Amigas and the SPARC through a Belkin switcher), Composite input (Amiga native) and S-Video input (the 3DO) all switchable.
On a good (and unfortunately expensive) monitor like this you can run anything - even MAME on vertical games because it tilts 90 degrees!
