I went with smooth ROM with brinked kernel. That kernel OC to 1500 but I knocked it down to 1400. Smooth ROM is based on CM10.11
It is extremely ..wellll.... Smooth. Comes with aroma installer and choice of kernels. Also with dolphin and nova launcher. Has an excellent bug free tablet mode UI. Only bug I have found is if I tick.... Use volume rocker to come out of sleep...... It doesn't work. But besides hat. Excellent battery life and speed. Also remember to calibrate battery after each new ROM flash. I also bought ROM Manager on play store. That along with Goo makes it easy for a monkey to flash his N 7.