I don't have any first-hand knowledge, but from what I've read and learned on here you're definitely better going to OME. From what I know, the spring rate for the TT coils are the same as stock, it's only the shocks that are different. I'd also go with OME shocks, though you might be ok staying with the Bilstein's, someone with more knowledge can answer that.
The front bumper and tent will warrant mediums, maybe heavies, but with the winch I'd definitely think heavies were in order. You also may need heavies in the back, though mediums may be ok.
Plus, more than anything, with the OME you get the lift :cheers: