I just got back (Friday, 1/27/12) from a very successful Kili trip with the following firm:http://kilitopandsafaris.com/
We did an extended 9 day climb of the Lemosho (Forest) route with this company and their services were phenomenal. All four of us reached the summit on the 7th day and spent that night at the crater camp. It took 2 days for the descent.
It was $3000 per person for the climb, food, services, all park fees, and hotel accommodations on the front and back ends.
We didn't do Meru but I believe you can arrange a climb with them if requested.
Ask for Gabriel Nkini (the founder and owner). I highly recommend this firm.