realmad37
G9X, and G15 
I have both and love every moment I use them
have those too -mx518 to g9x did not like the big case -too hard to up lift ,went to the small -just didn't love it, went back to the large ,added a few Velcro strips for ezee gripping ,works great now , also did not use the free wheel for a long time ,tried it and can't get over it, like night and day -give it a flick and web pages just flash down the screens or items in fonv or stalker inventory's.
-miss the placement of speed buttons on the mx-518 and really have to look for them on the g9x on the fly.
-g15 love the display for core temps ,but I don't use it for games anymore
-g13 only use that for games now ,map common -most used keys to a profile where on my left hand \ fingers sit, for repeat\no mistake keys , I map for my thumb [7 of them-3 buttons ,4 on the joy] -not for everyone ,but my fingers can't seem to always find the right keys in a fast fire fight , if I move it too far on a key board.also for DLC that comes out between games you can just go back to that profile and not have to think about the key commands.
-I like up and down alignment of the keys also
-second lcd I use for MSI AB ,do not like OSD but like to keep the real time monitoring of the system.