Alright, I've made this table to try and summarize the important features of the keyboards I'm considering:
KB Brand KB Model switch type price store rollover
ABS M1 black alps $59.99 Newegg 6-key
Deck Legend Ice cherry black $159.00 Deck Keyboards full (PS/2) 10-key (6-key + modifiers (ALT, CRTL, etc) (USB)
SteelSeries 7G cherry black $131.99 Newegg full (PS/2 vs USB not specified)
Filco FKBN104M/EB cherry brown $129.00 Elite Keybords full (PS/2) 8-key (USB)
Das Keyboard Professional cherry blue $129.00 Das Keyboard 12-key (USB)
Compaq MX 11800 cherry brown ~$15.00 ebay/geekhack ???
Scorpius M10 cherry blue $49.99 Amazon 6-key (USB)
Dell AT101W black alps $12.00 etiexpress ???
Solidtek ASK-6600U white alps $43.99 thenerds.net/amazon ???
Unicomp Customizer 104 buckling spring $69.00 pckeyboards.com ???
IBM Model M 1391401 buckling spring ~$40.00 ebay/geekhack ???
The prices listed above don't include shipping.
There is also the Cherry G80-3000LSCRC-2 for cherry blue switches, but it comes in a non-standard layout. I found it available from the following sellers:
http://www.totalbarcode.com/product/Cherry_G80-3000_Standard_PC_Keyboard.htmlhttp://www.geminicomputersinc.com/g80-3000lscrc-2.htmlhttp://www.poshouse.com/item.asp?PID=3737&CID=61Blue MX = "clicky" and tactile (clicky as in audible clicks, tactile as in feel of the click)
Brown MX = "soft-tactile" - lightly tactile without the audible clicks
Black MX = linear switches, no tactile bump and the switches make no sound. Heavy springs (unlike the blues and browns which are rather light)
Topre (capacitive) switches = These switches are difficult to describe, so I'll just say that they are very smooth, have a nice feel, and the switches themselves are quiet. These are my favorite switches
black alps: medium resistance, no audible click except bottoming out, medium tactile bump.
white alps: light resistance, pretty loud audible click plus bottoming out, light tactile bump.
EDIT: Here is a blog post I found that gives a very good description of the various key types:
http://hothardware.com/cs/blogs/mrtg/archive/2009/03/08/mechanical-key-switch-keyboards-demystified.aspxAfter reading that article, the alps switches also might be something I would consider. The black alps seem more in line with my initial set of requirements, and also seem similar in description to the cherry browns. The while alps seems similar to the cherry blues.
If any of that information is incorrect, please let me know. I'm thinking of starting with the brown cherry MX 11800, and if that doesn't work, maybe trying a blue cherry model?