I think one of these would be pretty nice, don't know what it uses for blades. http://www.youtube.com/watch?v=SzNDBYYSBUA

The discharge is in the rear so there is no piping hanging out on the side. This allows you to mow right up to things from either side, also makes the mower narrower overall for fitting into tight places, going thru gates etc.

It has a big very powerful impeller built into the top of the deck. The impeller packs the grass into the bags such that an 8.5 bushel bag holds about 200lbs of grass clippings when full. This is about twice what an regular bagger mower would load into this size bag.

Then it dumps from the seat, pretty handy.

The impeller suction is great enough to lift the uncut grass that gets flattened by the front wheels. With conventional mowers the strips under the front wheels don't get cut as cleanly as the main area. With this 300R the wheel lines are invisible after cutting.

This would also be a great rig for picking up leaves in the fall, something that I usually don't get around to since it is all hand work at the moment. The result of not picking them up is the deposit of about 1/2" of black gunk laid on top of the shop driveway.

Maybe when my 23year old MTD wreck finally dies I might get serious about one of these.