I think Sunderland is a given for everyone.
Liverpool is the only team that get under my skin when they win something. Bad feeling with everyone else fluctuates depending on manager/players of the moment.
Victory would be tainted for me - but only a little.
The cup wouldn't be won just on that one incident. We would have gone through several rounds to get there so assuming we hadn't cheated our way through every match, i think the disappointment would only be slight.