I don't have WiFi problems with my HUDL, its better than the Nexus to be honest. I have a pair of bluetooth headphones, £19.99 from ALDI, that work really well with both tablets.

The HUDL is fast enough to play Vega Conflict, which the Nexus wasn't. That drains its battery quite rapidly though. I don't have anything else as demanding as that, probably everything else is limited by WiFi speed.

My problem with iPAD is it seems to be compatible with other devices as long as they are Apple ones. And I don't like Windows of any variety, so I havn't even looked at Surface.