I would mount your bumper 1st..and winch if you are going to run one. Than crank your tbars back to the desired ride height. see if you like the ride or not.
Anytime someone adds a winch bumper, they will loose some ride height and need to adjust them. I would also look into upgrading your shocks and bumstops as that extra weight will be noticed on the front.
On my 08H3Alpha I ran the stock tbars with bilsteins up front and extended bumpstops, tbar cranked to 23.25" from center of hub to bottom of fender. I thought the ride was good with that setup with the extra weight.