Need ROM advice

[Gollum]

I'm planning to rip a few games in the future.
However, I have no idea where I should get roms from.
All the sites I've seen are chinsey little holes with adds all over the place.
None of them look very safe.

Anyone know a "clean" trustworthy place to get my roms?
Do not link me to places, this probably goes against a core TSR rule.
Just mention the site name, maybe give some info about it.

Edit> Also would be nice if the site told me what base system emulator I need before the download.

This thread is most likely going to be locked before I get a single response. How fun!