If you can wait a while...Black Panther Armor is developing exactly what you are looking for...a winch mount for the X that doesn't require a new bumper.
The Bull Bars don't have a winch mount, or the strength to support one. The receiver mounted ones are limited in strength, as even a Class 3 receiver hitch is only rated for 5,000 lb.
If you were only doing rocks at crazy angles...you could use less winch...
If you are doing mud, that stuff sucks your boots off, and requires the most powerful winch you can get...more like 9,500 lb, etc.
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- TJ
2001 Xterra '03 VG33, SE 5 spd, 305/70/16's, Revolvers, UBSkidderz, Doubled AAL's, 3"SL/2"BL, winch/bumpers, skids, sliders, OBA, Snorkel, pine stripes....
Friends don't let friends drive stock.
http://www.gifsoup.com/view/501230/tj-tackling-crawlers-ridge-o.gif