As someone who has a number of classic gaming systems, the best thing you can do for the PS1 generation and back is to get a nice CRT TV. Troll your local thrift stores, and Craigslist. Get a nice Trinitron. Or NEC. Or Mitsubishi. Stay away from the budget names.
Also, fun fact, if you're good with a soldering iron the SNES can be made to have component video out. It will output 240p, which will look great on a CRT and terrible on an LCD as it will try to deinterlace as though it's 480i.
Classic gaming demands it. If you're not emulating, you need a CRT. The better a game is supposed to look, the more it's going to take advantage of tricks due to the timing of interlacing on the CRT which won't exist on an LCD. Semitransparency for example.