$1500 FF? Will it make you reconsider...

The EM5 and m43 lenses hit the sweet spot for me between size and IQ.

I just got back from a month long trip to the UK, and every time I saw someone lugging around a big SLR and bigger lenses, I did not feel envy but rather smugness.

IQ on m43 is now better than on my Canon 40D. I imagine in a few years m43 IQ will approach FF quality from the last generation (e.g. 5D2), which will be more than enough for most situations for me. I still get out my 40D and L lenses for some home shooting, and imagine a new FF could easily best that APC camera. But I wouldn't drag anything that big on vacation.

It's not about money. M43 isn't cheap anyway. It's about portability and convenience with great IQ. Check. Check. Check.