Brings us to one more thing. A bagger. There are basically 5 types. 1) A grass catcher that sits on the side of the mower and catches the grass as it comes out the discharge. Quick and easy on/off, limited capacity and tends to blow dust and debris in your face, although some units can be equipped with filters. 2) Rear-mounted bagger that's basically a grass catcher but mounted on the rear of the mower. The problem is that they rely only on the discharge velocity to get up the chute and into the bagger and can easily clog, depending on conditions. Many find them to be infuriating for bagging grass but acceptable for leaves. 3) Spindle-driven unit powered by an impeller. Work well but draw power off the mower, are a bit more complicated to put on/remove, much more expensive and not available for all mowers 4) Mower-mounted rear bagger that has its own pony motor. Expensive and availability is generally limited to commercial mowers. 5) Trailing bagger with its own pony motor. Expensive and clumsy, but large volume and work well, especially for large volumes of leaves. To complicate things further, some mower-mounted rear units take bags that need to be manually emptied and others can be dumped from the seat.
Then there's mulch kits, chute blocking systems, and discharging with mulching blades (mostly what I do).
Just thought I'd toss this out as it may play into your mower choice. The standard residential options for bagging are typically the side catcher or the non-powered rear bagger. Personally I'd never want a non-powered rear bagger.
Opinions will vary, these are just mine.