I have never mulched with my 52 but some on here say the V+ deck isn't the best for true mulching. The Scag decks leave a very nice cut and are good at evenly discharging large amounts of clippings with no clumping. I use mine with Gator G5s and rarely have to double cut anything but severely overgrown properties. I have the mulching plate (block-off) but only use it when cutting close to a house, vehicle, or landscaped areas.
Before you buy a bunch of mulching add-ons, try the G5s or G6s and see how they work for you side discharging. I try to set my mowers up to be as versatile as possible and with this setup I can cut manicured properties and still plow through overgrown properties and make them look nice with a few passes.
"Always do your best. What you plant now, you will harvest later."