Hey all. I am in the process of (re)discovering clicky keyboards and want to get a model-m of some sort. I notice that there are several models make by Lexmark (52G9700, 82G2383, 92G7453, 42H1292) and am looking for some info regarding them. I have read that they may not be of the same high quality as the 1391401 and 1392090, can anyone confirm this (or provide any first-hand details)? Is one particular Lexmark model better than the others? Thanks!