I have an 882D with the 50C deck and I use a "Cyclone Rake" vacuum system which works really well. It will not pick up sticks but it picks up all grass cuttings and leaves. I can run it through a 5" layer of leaves and leave a 50" clear path behind me. Not cheap, it has its own engine, cost me about $1300 new, but very effective. Does not actually bag the leaves, it has a 1Yard container which gravity dumps. Check the web at
http://www.cyclonerake.com