I can't recommend the PSP's TV Out. It's kind of blah. SD resolution signal in a tiny window. I calculated it's using a meager 340 TVL of my monitor's 800, possibly not quite enough to resolve 480 pixels of PS2-level graphics. I dunno, I just wish the huge border were a toggle and I could run it full width 16:9 at least as my monitor is fully capable of it. It's ridiculous.
PC Engine Duo/Duo-R
AV Famicom
PlayStation 1
Wii (don't sleep on this, great library of lesser known titles and easy to softmod)
Oh yeah I already have a decked out Wii, forgot to mention that.
And a PS1. I forgot about that too haha