Hey Sportznut,
I am in a similiar position to you. I took Coria before the quarters and will just be putting a stake-saver on Gaudio. As good as Gaudio has been this tournament, I still have doubts over his mental toughness. The bloke broke down after winning the semi, a match early to be doing that I would think. In saying that, Gaudio has been impressive in finishing off matches of late and Coria may be feeling the pressure of expectation.
Gaudio won't take Coria out of his comfort zone as Henman did superbly for a set and a half. Also, Gaudio has beaten Hewitt and Nalbandian to get there, both opponents in descent form but not entirely comfortable on the dirt and made alot of errors.Gaudio won't get those errors from Coria and will find it difficult to hit winners past Coria,even if Gaudio's backhand is working.
I'm also having a small go at Coria 3 sets to 1 as on previous matches between the pair and form Gaudio is capable of grabbing a set. I think it might be the first as Coria may start off a bit slow and then find his consistency.
That's my two cents worth anyway...