Looking at some cruisers.......ive got a 10' wide slip.....these suckers are beamy at 9'6" (searay) and 9'7" (formula)......should I mess with this or not?

no.......

My neighbor has a 27' Regal which I believe is 9'3" beam. He uses rollers on the corners of the dock entrance and has no probs in 10' wide slip.

Your asking for trouble...

it's not just getting it in/out. What kind of wave action do you get?

wooses! Only Kidding but Heck I squeez a 9'6 beam Donzi in less then 10ft actually 9'10" its all in the art of the controls when backing in and white bumper guards on the pillings. the widest part of the boat is the rubrail.

little to none....back of a cove. That is another issue.....I would love to lift it but my current poly lift is only good to 8k lbs. I will need a bigger one. But all the lifts ive seen that will lift a boat backed in are similar to the poly lift in how they connect to the dock...and they take a couple inches each side. f*ck

Use a little KY on the rubrail!

nice....so does the boat pin-ball back and forth between the pillings with so little room to move? Do you lift it?

Not a good idea. That only leaves two inches on each side. You need to tie it off so it doesn't hit the dock at all. Unless it is dead calm at all times with no wind, you won't be able to do it. Even then, you would have to constantly tend to the lines which stretch and weather.

Michael