First off: thank you both for weighing in. This has been bugging me all day.
Second: I plan on doing 50/50 PS1/PS2, and I originally was going to buy a BC PS3 until I realized how they just aren't future-proofed at this stage (oddly enough, the PS2 seems fine?). Money isn't really an issue, so I'm leaning OSSC.
The most confusing thing to me is that I can manually force different resolutions out of my PS2 via GSM, and they all worked fine on other TV sets. The LG CX doesn't even get sound.
If you're mostly/only playing PS2 games and ALSO happen to have good soldering skills, the
GBS Control is currently the best for 480i content.
Problem is, you'd need to buy all the parts and assemble it. It's not difficult, just a little more trouble than just buying an OSSC.
Otherwise, yeah, just buy an OSSC - it's awesome and pretty affordable these days.
Oh, and the OSSC Pro might be out in the next year or two and will likely handle 480i content well, but it will be significantly more expensive. Just thought I'd drop that in there.
I'm personally averse to internal motherboard mods - if your console dies, it's a lot easier to just buy another PS2 and hook it up to an upscaler than have to take out an internal mod and reinstall it.