My partner has a disc wheeel - but it only comes out on non-windy days.

The boys and he have some deep rim wheels... thats on my shopping list - when I do a good time in TTs, I'm going to either make my current race bike into a TT bike with bar end shifters and aero wheels... or, if I'm very good and sweet talk my family I might get a beautiful Trinity...

Ah... I better stop, I'm drooling on the keyboard...

As for disc or deep... def use them, but avoid the disc if its windy - I have yet to try a aero wheels... but I am very keen too