No regrets, but some people have asked, "Why would you do that?" It certainly wasn't my intention. I wanted to have a backup body for my D7100, was thinking of getting another one and set it up the same way, looked at the D600 which is basically the same as the D7100 with a full frame sensor and same control layout. D800 was out of my budget, but I saw the D700, which has a D3 sensor, auto focus and 12 really good megapixels. Plus I have a couple of full frame lenses I'm using with the D7100. The 70-200mm f/2.8 VR1 and a Sigma 70mm f/2.8 macro. I also bought a 50mm f/1.8D on the cheap. Best part, the camera had a shutter count of 8800. Like brand new. I didn't think shooting full frame again (haven't since film) would be such a difference, but it really is. Especially now that I'm getting older and the eyes are starting to strain. The colors straight out the camera are amazing. Heavy piece of equipment, especially with the battery grip and 70-200mm on it. File sizes are manageable, but I keep in mind that my framing should be better because I don't want to crop so much as I would with the 24mp D7100. I think it'll be a great portrait camera. Focus is quick, startup time is almost non existent. It's a sweet piece of tech. So the question is, do I add a 24-70mm f/2.8 or maybe the 24-120mm f/4 for general photos? Maybe a prime for portraits, like an 85, 135 or a 200mm? Someone get the Pepto, I think I got G.A.S. Thanks.