Hi I'm new here and new to Apple computers. I'm looking into buying a 13 rMBP but I have been hearing about performance issues due to there not being a dedicated graphics card and the dual core CPU. I really like the form factor of the 13 in because I I travel a lot and I feel the 15 in will be to big. A little about what I'll be mainly using it for is web browsing (I usually have quit a few tabs open). Light photo editing and streaming music and videos. I will not be doing any gaming at all on the machine. So I guess my main question is do you guys the the 13 in rMBP will be ok for what I do and if you own one do you experience any lag while doing things I mentioned above? Any feed back would be great thanks in advance.