Here is the Sox rotation with this deal, with projected stats from the Bill James handbook, just for fun.
Johan Santana: 16-8, 3.00 ERA, 228 K, 58 BB
Josh Beckett: 14-8, 3.50 ERA, 187 K, 64 BB
Daisuke Matsuzaka: 14-8, 3.54 ERA, 188 K, 64 BB
Curt Schilling: 11-7, 3.54 ERA, 150 K, 25 BB
Tim Wakefield: 11-9, 4.03 ERA, 123 K, 63 BB
Buchholz is not projected. The Santana numbers are obviously assuming hes a Twin, since they were made previously.
Excuse me, I have to go clean that up.