Hmmm....yeah, odd set of choices on Bumper vs PML...
No one has suspension problems with a PML...its a safe and proven mod...and it works.
And - no one has a problem with a Shrock bumper...another safe and proven mod.
As the cost difference is such that you are weighing a $50-ish mod against a $600-ish mod...and the bumper's cost was in your budget anyway...I think its pretty safe to just do both, as if you can afford a bumper, another $50 is chump change.
So - No wrong answer...no matter what you do, it will be better than stock, look better than stock, and make you more capable off road.

_________________________
- 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