I have a
L3700SU, which is similar in size and features to the
L3400 and
L3800, it also exhibits the same jerky 3 point issues. If when raising the rear mounted implement I just pull the lift level all the way back (up) in one motion then there is no problem and the lift is nice and smooth. The jerky/ bouncing action is only exhibited if I try to do small adjustments when lifting upward. Never any problems when lowering. For my purposes none of this presents any real problems.
Of the tractors you are looking at, I definitely recommend the larger L series for the jobs you have described. The frame is a little heavier and should handle the heavier work loads you are looking at with greater ease and minimize downtime from wear and breakage. Also, the
L3800 provides a little extra HP and larger FEL to keep you moving and get your jobs done faster as the FEL on the
L3800 will lift higher/handle more weight/dig deeper. The extra weight and cost of the
L3800 is minimal for the extra benefits it would provide for your jobs. I think you would end up kicking yourself if you buy a B series. Just my opinion based upon previously owning a
L3710 GST to maintain 47 acres in Northern Wisconsin for 5 years, and now owning a
L3700SU HST to maintain 8 acres in North Carolina.
Best of luck with your decision!