okay thats a good baseline.
take a look at this guide
http://www.overclock.net/t/491752/mechanical-keyboard-guide
[strike]cherry mx red[/strike] not good for typing
[strike]cherry mx black[/strike] not good for typing
cherry mx blue
cherry mx brown
cherry mx clear
[strike]ibm buckling spring[/strike] too loud? see below before you rule it out.
at a bare minimum for typing i would suggest key letoff and tactile feedback. letoff is as you described on your keyboard and tactile feedback is a small tick that you feel when you press a key down a certain distance on a mechanical keyboard. personally i like having the audible element as well and consider both to be essential for the best typing experience. you can do without the audible though if you dont like it
this video shows the difference between keyswitch sounds
http://www.wasdkeyboards.com/videos
you can add rubber o-ring dampers to reduce noise a bit if you want.
cherry mx blues will have both tactile feedback and audible.
cherry mx browns will only have tactile and are a bit softer to press than blues.
cherry mx clears will only have tactile like browns but are harder to press than browns and blues.
since i will openly admit i'm a fanatic for ibm model m keyboards and the buckling springs here is a video showing the sound difference between a cherry mx blue and buckling spring keyswitch.
http://www.youtube.com/watch?v=Y2-H61noDE4
they are louder for sure but the keyswitches are better. the tactile and audible feedback occur at the exact time a switch activates and a letter command is sent while on cherry switches this is not the case. slight difference but i like it better.
the keys also feel more precise than cherry switches. cherry switches are more precise feeling than rubber dome and buckling springs even more so than cherry switches.
you can remove the keycaps and wash them as often as you like. this allows you to clean out the dust and dirt in the tray under the keys as well from normal use. normally its just dead skin cells.
the only two issues with them are that they are too loud for some people and that they dont support nkro but i'm not sure if any of them is really much of an issue for the average user.
okay i suppose that is enough about my obsession with the m/customizer but seriously at least give it it a moment of thought.
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cherry mx blues, browns, clears (or possibly buckling if you dont think they are too loud) are all switch options at this point.
to narrow it down i personally feel that cherry mx blue (or buckling spring) are the best for typing and should be the main choice.
if you want something a bit quieter then you could go for cherry mx blues with o-rings installed or cherry mx browns or clears.
the key resistance on blues is higher than that of some soft-touch or quiet-touch rubber dome keyboards but less than stiff models like the stock dell keyboards. i know this isnt much of a go-by but its the best reference i can give that you may understand. going by resistance in grams really isnt very easy to understand.
i personally have used a wasdkeyboard http://www.wasdkeyboards.com/
the semi-customs are $120 and allow you to pick some keycap colors, the type of switches and i believe a few other options. they are not backlit and have no macro keys though.
i've heard good things about maxkeyboard http://www.maxkeyboard.com/
they do have a cheaper model for $80 which is non backlit but has macro keys and also some for around $150 with backlighting and macro keys.
if you can live with a louder keyboard (or are like me and love the sound of mechanical keys) then you could get a unicomp customizer for $80. i havent used the customizer but its virtually identical to the m (employees bought the rights and started their own company with the same manufacturing machines) and i can tell you that they are certainly tanks.
the difference in feel and heft alone is quite an improvement.
now... you may ask why new cherry mx keyboards do not have this heft or quality feel and i can say that they do but they are also more expensive. products like the deck keyboard http://www.deckkeyboards.com/ are more similar to this heft and quality feel but also tip the scales at $180. i'm still not sure they have a spill tray inside though. since i dont think the cherry mx switches are set up to work with one.
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so... read the post, watch the videos and get back to me on your thoughts on everything.