I used to run a 163 Burton Republik (comparable to the arbor??? dunno) and have found the 3800 to ride very differently. I still have to set the bindings back a bit for pow though, but not a drastic change. I also found the tail to be pretty stiff so that was slightly unexpected.
Still a good ride, but like I said, off-piste oriented, but can still rail. Again I am riding SBs on them, so not sure about how the HB's will work.
-Gord