peltiers are cool as hell, but there are some things to note about them. First and foremost, they take time to cooldown, meaning you want to turn them on a couple minutes before you turn on your computer. Secondly, they take up TONS of energy, watch your electric bill.

If the startup issue could be solved, i would consider peltier's THE way to go as far as quiet cooling is concerned. Small, quiet, and effective (if not efficient). If you're feeling really extravagant, you could always watercool your peltier, that way you get REAL good thermal dissipation.

as for as the 60mm fan/HSF is concerned, i really like the thermalright heatsinks. The SK-7 is probably the most cost efficient of all of the heatsinks and cools extremely well. Any low speed 80mm fan should do you well. This is the setup i use on my 2000xp overclocked to a 2500 without reaching temps over 45C ever. If you want a gigantus heatsink, the SLK-900u is the way to go. It's not too expensive and will cool like nothing else. Note, you need to make sure your mobo has the screw holes and room for this monster.

"Panasonic Floppy Disk Drive " .. . ithink that's your biggest culprit :P actually, in one case, i quite effectively used my floppy drive between two harddrives as a heatsink for them (the bay wasn't well designed, so there was lots of contact area). It was pretty effective, you could try that as well.

You really only need to worry about active cooling on your CPU and GPU here. There aren't any 10k RPM drives or 7200RPM 120+GB drives that will generate a TON of heat. With that said, i'd still stick an 80mm fan in front of them for some cooling.

I guess you'll probably end up needing 3 80mm front intake fans (don't know if you can fit that) to cool all your hd's and get some air moving in the case and one or two exhaust fans for your case. Your case looks big enough that it should keep the other stuff cool.