I've been thinking about changing my case for a while (and possibly ditching watercooling). Right now I have a SLK3000B with an MG Metro (car) radiator bolted to the side. There are three low speed Yate Loons at about 7v on the radiator and another two inside the case. The (extremely loud) hard drives became less annoying when I soft mounted them, but the case is still a little loud. The biggest hassle is trying to move the thing around - it's very heavy and awkward, and all of the exposed radiator fins are a bit fragile.
I was thinking of moving to mATX and going to air, but I also liked the looks of the Antec 300, which has almost exactly the same dimensions as the case I have. I hesitate going to air cooling because I like my overclocking, and it's hard to resist the urge to tweak. And I know watercooling can be quieter.
I figured a 2x120mm radiator might fit in the front of the Antec 300, and I found a person who has done this rather nicely: http://www.techpowerup.com/gallery/details.php?id=2124
The problem with radiators is always the pressure needed to push air through them as well as the fan hubs and other dead spots. The real question of this post is this: do you think an Antec 300 with a quiet 120mm and 140mm fan at the top rear would provide enough negative pressure to pull air through a radiator at the front, assuming the rest of the case is sealed? Would that be a quiet setup?