High above the River Danube (DP1M, Warning: original size 9MB!):
Et tu, James?
The sd quattro has the same sensor as the dpQ cameras, with the benefit of being an ILC. It's still not usable past ISO 800 for my purposes, and is still crop sensor.
If you want a Canon, go for the original 5D. It's still incredible, and can be had for under $400, which is absurd for a FF camera that's built like a tank. ISO 1600 was still usable too for me. Those fat pixels are going to be magical with your 135L