Background:
Playing 5 handed in a tough £1/£2 deep cash game at DTD. Line up is:
CO: Simon Deadman (~£600)
Btn: Neil "jakally" Giblin (~£1500)
SB: Me (£835)
BB: Mitch "Mitch" Johnson (~£2500)
Straddle - lol what a balla these days: Alex "Cambridge Alex" Goulder (~£800)
Neil opens the button to £15
I find

in the small blind and 3bet to £55
Mitch calls
Neil 4bets to £185
Hero

Reads: I perceive Neil to be a
terrible very good reg who is more than capable of bluffing in this spot. In general he is probably in the tighter half of this table (along with me), but is not a nit by any means, also he has appeared to noticeably be more keen to go to war preflop tonight than when I have played with him previously (perhaps because there is an absence of weaker spots in the game), and has already 5bet Alex's UTG 4bet and shown

and 4bet Mitch and snap folded to a shove. I have also already 3bet and 4bet him on a few occasions in this game but not yet shown down any hands in these spots.
Mitch is also a
very good terrible reg, but in this spot he will definitely be peeling wider than most, and it's 100% not the case that he always has a strong hand here, I'm pretty sure he would be 4betting all of his monsters here. Neil also knows this.
Im interested in discussing firstly the sizing of the initial 3bet (anyone think just call?) which is probably a little on the small side, and how people would rank the following options now:
a) Fold (If so what do you do with JJ)
b) Call
c) 400 -> Call
d) Jam (I guess this is pretty much the same as c)
Also please dont waste both my and your time by posting something along the lines of "unreg pre". I do know this is not a good game. It had been a better game earlier in the night and i stayed because i was enjoying it, pure and simple.