All of those middle relievers are pretty good, but I would probably leave Todd Jones at the end of the list. I think Ray King will get the most holds, but Marte and Ayala will probably pitch more innings, with more impact on your ratios and chances at vulture wins.
You have a ton of starters, and any of them will probably get snatched up when you drop them. I share your hopes for Penny, but at this point he is probably the least attractive of the starters you have.
You might want to keep your three bench position players, since Berkman will not start the year in the lineup, and Drew is susceptible to injury.