Yes, both PT models I believe have a Luxeon- the Matrix 2 with 2 AA cells and the Yukon HL with 3. The Yukon is somewhat brighter than the Matrix but the Matrix is such a simple, straightforward light that I end up using it all the time- hiking, reading at night, etc. The Yukon has the standard battery-in-the-back style (3 AAs in a lightweight case) and for everyday purposes this actually is an impediment because you have to think a few more seconds to adjust it correctly on your head, hat, helmet, etc., and also because if you are lying down reading in your sleeping bag the battery pack pokes you right in the back of your head. That's why I asked kg4ote if the battery pack in the back is so important- it's a relief on some nights to come down with a lightweight Matrix 2 on and not have to worry about balancing the battery pack in the back with the lamp in the front...but then again not that many people are running down a mountain in the winter with a headlamp on.
Given the plastic construction I believe they're way underdriven so not as bright as the metal Luxeon lights like the Surefires. I have yet to get my hands on a fully powered 1,3 or 5 W luxeon headlamp, but when one comes out I think there will be a lot of people in the rescue, SAR, hiking, climbing, and caving communities who will snap it up. BD also makes the Zenix, which is a nice light with two LEDs and one Luxeon in the middle- but oddly enough there wasn't that great a difference between the two modes (2 vs. the brighter one) which makes it kind of an odd light.
I am curious about the BD Soliras (not sure if the spelling is correct) which BD touts as the brightest headlight of its type- i have yet to see it at local climbing stores or REI- that may be what kg4ote is looking for, although the price is 4 x that of the Matrix, I believe in the $150 price range, kind of steep unless it is so much brighter than the Gemini, which is in the $25-$30 price range.
When someone puts a Luxeon 1, 3 or 5 W on a headlamp i think a lot of people who are outdoors people for a hobby or by profession.
Hope that helps.