+1 to whatever you have in your bag, more specifically what you can afford. I suffer from GAS as bad as anybody, but people need to create "the ultimate gear bag" organically when they can afford it, or simply when current equipment hinders their requirements.
That being said, I recently upgraded to 5d3+24-105L which I have gotten about 8000 shots out of since September and love what I am getting out of it. That is my go to for now with a 50 1.4 thrown in for low light. Rented 70-200 2.8 II and loved the compression and sharpness I got in daylight, but in low light it wasn't everything i expected so that will stay out of the kit for now.
If I am doing fast action sports I still stick with my t4i and 55-250 kit lens. People can harp on kit lenses all they want, but my 55-250 copy I have is more than adequate and I have equivalent reach of 400mm on FF which would constitute a significant expense for my budget. If I made more money off of it I would upgrade, but wouldn't we all...