I don't think you should fear going back to not using asio4all, the delay caused by the odd buffer size is unperceivably short and worst thing about it is the annoying popup.
that's interesting - I thought it must have been something fundamental to warrant a popup!
The advantage of using Asio4all is that I should be able to use the Virus as an extra set of ins - it would be quite useful to have another pair at the moment
T