At which jump range? I haven't checked the distances personally (currently rebuilding my gaming rig - and even if I complete this in time, which is unlikely at least, my CMDRs are nowhere near the bubble), but from what I've read, a healthy jump range may also be necessary, which is not exactly what the iCourier or the Viper excel in - at least not if you want to keep the speed high.
I threw together a theoretical Hauler, though. Fully engineered, 699 m/s boost would be possible (and independent of the cargo), but with the required load, the jump range would be a measly 45 ly. On the other hand, a Phantom would be limited to 590 m/s, but could jump 67 ly.... so, ~600 seconds of bonus, i.e. ~12 jumps, vs. 20 ly more range. Intersting concept. I'll be watching.