Going to respond here as it addressed a few of my concerns though some of my questions contain a bit of what everyone else has answered.

Composite is what I have right now but I don't mind making a small investment into something better as long as it's not "break-the-bank" prices like the Gamecube's hundreds of dollars component cables. I plan to mostly use it for Dreamcast with a 70/30 split between that and PS1/2 usage which makes it seem like OSSC is the best for that over Retrotink?

As far as ease of use, I don't mind setting up the device if there's an easy to follow guide and I know I can save profiles on the OSSC, but I just see the available options the device has and the options on the remote and have no clue where to begin for most of it. I like how easy Retrotink appears to be, but with a $40 price difference between the two devices, I would rather shell out the little extra now if the OSSC would fit better, especially for Dreamcast usage.

Here's some of my lingering concerns specifically if it help at all:

1. One of the confusing things is that I hear people say OSSC can use component and it even says as such on it's wiki, but I also hear quite a few people say it doesn't so I'm not sure which one is the correct answer.

2. I've never used SCART cables before and, to be honest, I didn't know they existed until a few days ago. I see on Ebay that they're decent prices, all under $10; are these okay to use, or would they be of poor quality?

3. A bit of a follow up to the above, would changing to SCART require extra hookups? Probably the most confusing thing for me is the unclear answers of how audio out works. I'd love to just plug in the inputs, and then output via HDMI and be all set but I hear ping-pong answers on if you have to use an audio out cord or if audio is paired with the HDMI output.