Yeah, I've got the OM Trailbreaker too. He's not perfect, but I thought he looked the best of the offerings, and I was really impressed how the chest gimmick works to narrow the front of the truck so he has a waist and doesn't have Ironhide's potbelly. Given the number of TB choices out there, any one of them could probably be had pretty cheaply.
Downbeat doesn't look as slick in car-mode as coolsville, but in botmode he's damn near perfect once you sticker him up. The way they narrow his chest gives him more toon-like proportions and keeps him from having that alternator look. The face and accessories are spot on. I wish the bottom of the chest locked in a little better, but that's a minor nitpick. The chrome stickers for the lower legs and feet do wonders for covering up a lot of the silver plastic, removing the "cheapness" vibe too. Overall, downbeat was worth a purchase, IMO.