The reason the Tsunami is noisy is because of the thin aluminum shell. Any steel case will be less noisy, all else being equal. My Rosewill R5604 is very quiet now that I've retired my old 10k SCSI drives (see my Rosewill thread here). The 5601/5604 have rubber isolation for the HDDs like the Tsunami, comes with fairly quiet 120mm fans f/r (mine came with Jamicons - IDK what's inside now) but can be replaced with Yate Loons or whatever suits your fancy - they can even take the Arctic Cooling AF12 in both locations, few other cases can do that. The 5601 could be the quieter of the two with the louvers on the front bottom. The Tt SViking was built on the same chassis as the 5600 series. Their R6A series is built on the same design as the Tsunami/Antec SLK3000-B/etc. but are steel like the Antec so they should be quieter. It's is hard to find better cases for under (or over) $100. Just try to find a case with similar features and you'll be OK.
My Casitude Criteria:
1- Rubber isolation for HDDs
2- Mounts for 120mm fans f/r
3- Some well-designed ease of use features - toolless, drive rails, etc.
4- Indirect air venting on the front so any noise can't come right in your face.
5- Normally oriented HDD rack or sidesaddle if some thought was given to cooling the drives (large air openings).
6- Doesn't look like a steaming pile.
.bh.
