I used to have two, but then my other one got got shot down for some apparent reason. So now I'm stuck with one: www.dgemu.com
You can download most roms here, you just have to register and you're up for some wide variety of choices. They operate on the same point system as other roms sites, but seeing as how you have a free 12.5pt (automatically regenerates after a day, if you have already spent all points), is not big of a deal.
Come post your sites ^^