If the extra pick is a 2nd rounder, I would like that deal. For a 3rd rounder (assuming not at the bottom of the 3rd? - bleh. It might turn out ok, but for a 4th rounder, I don't know if I would be upset, but I would be at least a bit disappointed, I suppose.
Edit: I misread. You said 2nd or a 3rd AND 4th rounder. I'd still take it for a 2nd, but am not sure if a 3rd and 4th rounder would be that intriguing. I wouldn't hate it, but I don't think I would like it.