No one has mentioned Ken Griffey Jr. as a right field solution. I realize has numbers were weak last year, and he has alot of injury issues, but he had successful knee surgery in Oct. that explains his drop in power. He wouldn't have to play everyday. He sould be motivated, he and Lou have history, and he souldn't be to expensive. No other possible solutions have as much upside as this on in my opinion.
Other than this I would keep the roster the same as last year. This team didn't lose because they weren't more talented. They lost because they couldn't handle the pressure.
As far as Peavy goes I would offer Harden in the deal to save payroll. It may be more money than San Diego wants to add, but there is only 1 year left on Harden's contract, and someone else will end up paying that when they trade him for more prospects. Marquee's contract is gone after this year, and Lilly's is gone after next. I could live with Peavy, Zambrano, and Dempster 1,2,3, for the next 4 years.
No one is going to take Marquee's contract off our hands, and that may be ok. He hasn't been that bad, and sometimes players excel in the last year of a deal for some weird reason....
Just a few random thoughts to comment on