hi, i highly recommend using peter mato as your guide, you can schedule direct with him,
i just scheduled another hike up kilimanjaro booking direct.
you get the same high quality attention/service whether you book thru REI requesting him, or book direct with him.
if you are up for a challenge the marangu route (rei) will be too easy, i found it to be a walk in the park, when i return this october I will hike the lemosho route, less people and more days to acclimitize.
the internet has alot of positive testimonials about peter. just search.. peter mato kilimanjaro
hope i was helpful
feel free to holler back if you want more info.