I've been in a similar quandary. I started out with a 13" MBPr but then, after giving the 15" MBPc a try, I decided I just couldn't pass up the 15" with quad core and 1gb dGPU. I've had my 15" base model MPBr (2012) and it is a significant improvement over the 13" in my opinion. However, I keep vacillating between how much I need this much power and screen real-estate vs. the extra $500-$600 cash I could put back in my pocket. Ultimately, I've decided to keep with my 15"er. It still makes me excited to wake up in the mornings and fire up so that's worth the extra cash out of pocket to me. Personally, whether its true or not, I feel it'll be a better long term investment for future proofing. That's my story and I'm sticking to it!