I'm lovin the jumbo accelerator W/ jumbo extender. I have a 2009 next lazer and a 2011 36 viking hydro and it fits both.. I have ocdc on both and the bagger still fits both without taking anything off. I can go from side discharge to mulch to bag within seconds.. They do have the ultra vac but i don't bag all of my lawns and with it once it's on it's sorta a big deal to take the blower off and side discharge on the no bagged lawns.. Anyways that's what works well for me..