Have you ever shot a pistol-grip only shotgun?
Bogie was ouchie...
I'd consider adding a front handgrip, so you could at least have to hands on the thing... Some sort of shock absorbing material might be nice. Gloves at a minimum.
IIRC, $200 mfg tax is the same regardless, but if you can make an AOW, then you're ahead with only the $5 transfer tax.
Another thought - consider the length of the action - IIRC, most side by side locks are shorter than over/unders...