I'm just curious how many DIYrs use the norco's for their builds.

I had originally wanted to use a Lian Li pc-343B case, but when I started adding up the cost of the needed componnents then the Norco RPC-4220 literally screamed at me.
And the Chenbros though nice are also too expensive I would have been all over their 50 drive case if it were priced in a range of sanity.

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Current DIY server DL380 G6 2xquad core 2.8ghz 32GB rdimm ram 512mb 2xHP 410 raid with 2x sas expanders (2 X norco RPC-4220) 48 slots stacked with room to grow.
30TB (Movie/File/Music)Win 2012 essentials 64bit Storage spaces
Ex490 E6400 4gb ram

I'm not using Norco, but http://www.xcase.co.uk/X-Case-RM-420-Hotswap-4u-p/case-rm420.htm instead. Norco's is almost impossible to get hold of here in Europe. I haven't got i yet, but it's coming next week.

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EX470 V3, 2 GB, 3800+ X2 EE SFF (@ 2Ghz), 4 1,5TB Seagate
Win 7/64 Ultimate, 6GB, i7 920 @ 4000, 16 TB
Win 7, Lenovo X40
Win 7/64 Xtreamer Ultra HTPC
Norco 4220, Q6600 16 TB
D-Link 655, Level One 8 port gigaswitch, Cat 7A cables

I have a 4220, along with the 120mm fanboard mod.

I chose the Norco 4220 because of the 20 hot swap drive trays, easy cabling options and low cost.

I also have on with the 120mm fan board you can find in the marketplace section.

I have a 4220 case that just came in and I'm starting my build. I went with the 4220 to cut down on cabling in the case over the SATA option.