I have a tab 12.2 pro and I'm very happy with it. TW isn't as laggy as some people made it out to be. Could be smoother but it honestly doesn't interfere with my use for it (browsing, video watching, gaming, etc.)
Development for the tab 10.1 and 12.2 wifi pros are pretty slow right now with all the focus mainly on the 8.4 (there's now a custom rom for the 10.1). All in all, I think you'd be pleased with it coming from the nexus 10.