You could also check out the WASD V2. It isn't backlit and it has dip switches like the FC660m if you like to remap caps lock to ctrl, or disable the winkey etc. WASD also offers user-customizable keycaps, which are abs, but it's still a nice extra to personalize your keys.
With tkls and 60% boards, swapping cases can be a challenge. For example, there are some CM and Filco boards that fit in vortex aluminum cases, but the V2 might not fit, etc. It's also something of a challenge to track down an aluminum case. I use a CODE, which is a backlit V2, and I'm going to end up spray painting my case...