As it happens, I actually tried those not too long ago. They're kind of a bear to get working on Windows 7, unfortunately. Especially the widescreen hacks. I've had physical copies of these things on PS2 since they came out, but I have a pretty bitchin' PC these days, and it's way easier (and better looking) to just emulate most older stuff than to dig them out of my collection.
If you can spare the time to dig out the PS2 copies, imgburn should create a perfectly viable image for emulation. Might be faster than trying to find an exact download match for something you already have.
It's pretty painless. Stick in the disk, run ImageBurn, say 'make an image'. Just make sure to tick the option to ignore errors. PS2 games will probably flag a couple. It hasn't affected the ability to play the game for the few I've tried.
I think Emuparadise is pretty good. BIOS's(often needed for disc based consoles/PC's) often aren't readily named properly, but the fact is they actually have a BIOS section. If you're the type to go for it, they also have complete rom sets.
For ISO's(discs, like for ps1) I'd recommend the forums at SNESorama. If not signing up at Emuparadise.
I'd be a little wary of emuparadise of late. I used it recently and it seems to have messed up my laptop pretty good.
I use romhustler for the main NES/SNES/MD/N64 stuff, though there are things they're missing and they don't have FCDS. I also use them for MAME, because they've now become really good about updating MAME sets! They have never steered me wrong other than whatever's missing, but recently they've put up one of those "download accelerator" things, so uncheck that and move on. Also recently, you no longer have to wait for each download, so you can do things like grab MAME clones all in one go.
I use emuparadise for PS roms (oh man) that other places may miss and X68000. They also have scans of various guides and occasionally have album/game rips in the forums like ffshrine. Haven't had any issues with it, other than it loading really slowly.
I use theisozone to see what kinds of old PC games they have sitting around. They tend to have CDDA removed, but oh well.
I use edgeemu for PC Engine, PCECD, and Mega-CD. Easiest way to get these, seemingly.
I use planetemu for GB/GBC/GBA and some others like MS/GG and WonderSwan. Again, most convenient way to get these, and everything's even named properly.
Occasionally I'll go to romnation or rom-world when I need an old MAME rom (romnation is good if you still to 0.99), and nitroroms for the occasional PS rom (yep) that's hard to find anywhere else (damned Gran Turismo 2 versions)
Not a lot else I need beyond that... too bad snesorama had to reboot everything, some of those dumps were of much higher quality than usual.
Last Edit: Sept 30, 2014 2:21:33 GMT -5 by Startling
It does require having an account but you can download things without making a donation, at least it works for me. As for "it doesn't really have that many things", well, if the entire catalogue of Sharp X68000 is "not much", then I don't know what is.