With the new point costs, Reavers are now unbelievably good (albeit however briefly, given that the new codex is rapidly approaching).
Look at them- they're T4, 2 wound, 4+/6+++ for TEN points per model, with access to Combat Drugs. That would be an extremely impressive infantry statline- but they have a 18" move, the fly keyword, 2 attacks at S4 AP-1, and access to impressive upgrades.
Compare Tactical Marines, which sport a statline that is worse everywhere except the one-point-better armor save... and are EIGHTEEN points per model.
These bikers are ridiculously good.