i haven't written up the '08 BD Spot yet in the somewhat comprehensive list of HLs using newer Cree, Rebel, and SSC emitters.
however, i have posted elsewhere about the new Spot. just click my screen-name/alias and then click the "See all Posts by this User" (or whatever the precise wording of the hyper-link is). there you will be able to find my Posts on the BD Spot.
it is really bright. since the beam is much more focused than the PT Eos II, it appears a LOT brighter than the Eos II. however, they both may be putting out approx. the same amount of Lumens (*NOT* Lux - Lux-wise the Spot definitely has a MUCH brighter hotspot than the EosII).
i prefer the '08 BD Spot to the EosII. the only question in my mind right now is will the burntime on the '08 Spot be any better than it was in the previous version.
with perhaps one exception, IIRC, all of the BD LED headlamps that i've owned fr/their last two generations of HLs prior to '08 have *NOT* lived up to the Mfr. claims for burntime. yeah, maybe they produced 0.25lux @ 2m for the stated time (BD has now adopted that measurement standard, just like Petzl and some other Mfrs), but in earlier years they didn't clearly reference that standard and just gave some burntimes which i was never able to achieve (except perhaps in one case, IIRC). additionally, while i see the value of the new standard, i don't find the lower limit of the test to be real useful except for small task/proximity lights. BD is NOT alone in this "crab" of mine. i've similarly faulted other Mfr's for "inflating", IMO based upon my particular uses, their burntimes.
i simply can't hike an indistinct semi-technical trail w/just 0.25lux. YMMV.
hope this info helps.