Well, the hitting cats definitely devalue speed a ton so keeping that in mind..
Hitting: I agree, good hitters! Dunn is a top 30 guy in this format and Granderson is a stud as well. I'm not a huge fan of Prado in this format since he gets a ton of value from his BA. Rollins is also a question mark, but SS is shallow anyway so that's a risk you'll have to live with. Great pick on Espinosa. Berkman may not get enough ABs to be worth it, but I'm guessing you didn't spend a high draft pick to get him anyway. Just keep an eye on the WW and use the hot hand.
Pitching: Well the top of your pitching staff is solid but it lacks reliable SP depth. Not bad, just alot of risk at the back end of your rotation. It could turn out fine, but either Nolasco or Jackson has to pan out for you. If you want you could trade an RP for a reliable 3rd or 4th starter (Lilly, Dempster, Danks). Otherwise just see where the start of the season takes you.
Overall definitely solid team that provides you with flexibility. You need a bench hitter to step in when Berkman isn't playing, so make sure to pick one up when you throw an RP on the DL.
...Boston papers now and then suffer a sharp flurry of arithmetic on this score; indeed, for Williams to have distributed all his hits so they did nobody else any good would constitute a feat of placement unparalleled in the annals of selfishness. -Updike