I've played with all of those, for personal preference and how it suits my game, I liked the Pechauer one, but all were 29" except for the OB 1 plus which was 30". Pechauer had the least effect on the hit of the cue and had the least effect on the balance of the cue.
My favorite LD shafts are from Mike Webb though, for something like $220 he can make one for you to your specs and it has the same low deflection as anything out there with a ton more feel. Also the Players HXT is a good pick but to get a 30" one you need to get a blank and have someone finish it for your cue. It's not super LD like some, but to me it matches my game and I love the hit feel with it.