I would pick the Nexus 10 over the Asus Transformer Pad Infinity TF700. I played around with the Transformer pad and wasn't that impressed. My preference is to stock android.

You say this will replace your laptop. In that case I would choose the Microsoft Surface Pro. Don't go with a Windows 8 Tablet running Windows 8 RT. You won't be able to run as many programs. Even though you have a main PC, I would go for a tablet running full Windows 8 just in case.