This is my $0.02:
Yeah, the PEPs are probably pretty sweet shocks, but they are non-adjustable. Also, from what I've read, the real problem with the 450's is the rear shock, not the fronts. For another $150, you can have the fully adjustable fronts rebuilt and set up exactly how you want it, and you'll also get the back re-valved and re-sprung along with a new rear link, which will give you a much plusher ride with little or no bucking in the choppy stuff. That sounds like a much better idea to me for a recreational and local-level MX rider.
'00 416ex -- 11:1 Wiseco, stage 1 HotCams, LEXX slip-on w/ modded header, ASR +2 arms, 450r shocks, G-Force axle, FST style cooler, Trail Tech bars and clamp
Temporarily retired from my extremely short (but successful) racing career.
Maybe some IXCR in the near future.
A government big enough to give you everything you want is strong enough to take everything you have. - Thomas Jefferson
None are more hopelessly enslaved than those who falsely believe they are free.
-- Johann Wolfgang von Goethe