Now I'm contemplating a 13" rMBP because my "dream" device I guess would be a system light enough to take with me everywhere that could be docked when I get home to a monitor, mouse, and keyboard with the power to run VMs and photoshop.
The only thing is, a 13" rMBP just feels like a big compromise. Less portable than the new MacBook or an iPad, and less powerful than the 15" rMBP. But I just don't want to end up like Freyqq and have a system that's rarely used.
If you are able to wait, I would say to see what Apple does with the 13" rMBP once the Skylake processors are available. It's possible at that point the 13" model could be as powerful as you need it to be while still having the smaller form factor. That could make it your ideal laptop.