Yeah, but it's easy to look back over an entire season and say we could have done "this" or we could have done "that" and been better off. These statements are all couched in the assumption that we would/could have signed the perfect players. Donaldson, last year, anyone?
Without doing a lot of research I'd also say that there are a lot of players whom we could have signed for $13 who could have stunk the place up. I still think that for $13M we get a known commodity in Buch and very possibly the best "stuff" available for that money. Sure it's a crap shoot, but very possibly less of a crap shoot than some other players in the twilight of their careers whom we're hoping for a magic season from.