I think the old Bullit series, and the new one too, do much better with a piggyback shock. I think they need the tuning capability. A Van RC would be OK, but I really liked the air adjustable piggyback on most of the shocks I used on my Bullits in both air and coil versions. Oddly I think the DHX Air worked fairly decently on my Bullit as long as serious freeriding wasn't involved. I'm currently running a Vivid R2C coil on a Nomad right now, and it seems like it would be suited to the Bullit also, even though there's no quick air adjustment to the IFP in the piggyback.