Yeah, get the Bils in the 5100 series.
If getting all four, get the one's for the 3" lift, 10-20% stiffer than stock, depending upon if you are in up armor mode in the future.
If you've done a PML of course, you are probably just bouncing the bumpstops, and shocks won't help.
If only getting the fronts...same on the stiffness, but, they are the same length with or w/o the lift.
(The bils for the lift fit even w/o a lift...giving you the option in the future, with no downside)
The 5150's you mentioned are great, but from your description of why you need them...well, you don't need them.
If $ is no object, sure, they are great.
_________________________
- 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