Well it all depends on what connectors you have for the various machines. I aim to get a SCART lead for every retro computer I own and then you can plug them into a multiple SCART connector box, this is the easiest way. Then its a case of choosing a TV that has the other connectors like RCA/CINCH, RF etc to cover things like the DTV etc.
I have tryed 2 Samsung LCD tvs 19" 940MW and 52" FullHD. Picture just looks lot better at normal tv/monitor. I even dont like how Dreamcast looks at it and its lot newer than those 8bit machines. But for some reason TI-44/9A looks really nice at 19" with composite.
I use a Commodore CM-141 (with a separate switch box) for my Atari computers and my TI-99/4A (I also have my Flashback 2 plugged into the same monitor for some occasional 2600 action). TV-wise, I need to invest in something soon for some of my other RF-out systems, but I'm facing a big move soon and I don't think it's wise acquiring a heavy old TV at this point.
I tryed Svideo with both and I think I tryed composite and Y/C Scart with 19" Samsung. Also tryed Vic20 with 52" Samsung FullHD. Picture is sharp, but I think its too sharp. I think I have posted some pics of that 19" here before.. I try look those.. But there is also C64 Commodore Christmas video..
Yes. I think that there were more problem when things start to move. C64 demos that have scrolling text and when you load something and it does flash those colors at screen. It just doesnt look like it should. I dont know I just like tube lot better
I use Sony Trinitron monitor. It had 4 composite video/audio connectors, S-Video and Scart. so its very nice at computer partys (or kitchen ) when you can connect many retro computers at same time. Composite connectors were BNC, but RCA adapters are very cheap other problem might be that Scart doesnt support Y/C, even its RGB scart connector, so I need plug C64 to S-video. There is now Vic20 (composite), C64 (S-video) and Atari Jaguar Connected (Scart) and still 3 composite connectors free. Also its maybe a little heavy, course it has metal covers.
Also those old tube tvs are cheap now, I got one 21" tv with two scart connectors (there is often just one, so this was one reason..) from recycling center. It did cost only 15 euros. 1/2 prize, course they wanted to sell all their tvs. I think that these days everyone(else ) wants LCD so those tube things can come more hard to get.. Atleast for me it was alarm that recycling center wanted sell all their tube tvs away.