You would be lucky to find more that a dozen people on this list ( or any other one ) running your combination of mower & deck.
Dixon with a Husqvarna deck ?
Most only come here to be told how to fix their problem then dissappear till the next problem.
I have a couple of customers who run the 48" fab decks on Husqvarna LT 2648's and both have given up mulching.
This is because they want to cut their grass 1/2 " long and could not appreciate that the mulched grass needs some where to go and the extra updraft will stirr up a lot of dust ( geese, read the instruction manual, thats a bit rich ).
OTOH just about all of the commercial mowers mulch.
Now the difference in price between the mulching blades & throwing blades is about $ 10.00 down here, so $ 30.00 a machine or is terms we can all understand 2 x six packs of local beer.
So put them on and see if you like them.
Remember to cut higher, 2" is minimum 3" is better
Clean out the build up under the deck or it will be a ventilated deck in no time flat.
Clean out the accumulation of clippings & dust from under the mower. Air is best water needs care or you will suck water into the spindles and kill them in less than a season.
This is very important on Husqvarna Lawn Tactors as the crud builds up under the clutch/brake pedal stop which prevents the pedal going fully home which promotes belt slip and will eventually stop it driving all together, kill the belt and even the idler pulleys.
No idea if any of this applies to your decks on your mowers but it does apply to 48" Husqvarna decks on their bigger LT's & GT's