Fellow former G15 user here. I recently switched to Logitech's modern replacement for it: The G910 Orion Spark found here http://gaming.logitech.com/en-.... The design is a bit more ostentatious, but it covers pretty much everything I liked about my old G15, except with a relatively quiet mechanical switch. You can even use a phone to perform the tasks the old G15 screen used to!
I'm not sure which version of the G15 you had, but it's about the same size as the V2 (orange LEDs) and substantially smaller than the behemoth that was the v1 (blue LEDs). I've only had it for a few months now, but I'm not finding any complaints about the build quality.