I also do Nutro Natural Choice and some Fancy Feast every few days-they have great flavors(according to Charlie). Nutro makes a canned hairball formula, which I give him on occasion. He also loves the Whisker Lickins chicken flavor treats. He can spot that orange bag from a mile away!
I skim his kitty litter every day (well, sometimes I miss a day, which he's never happy about). I use scoopable litter. I started with the flushable kind, but I couldn't find one with good odor control, so I gave up on that idea.
Good luck and let us know how it goes.