Buying Advice MZT 52 or Hustler SD54

newbie to the forum, first post but been a searcher and reader for awhile. need advise, I find myself in sort of the need for a new mower, really more want than need I guess, my 99 Scotts 42'' 16hp is still working fine but my yard was being cut for the last 5 years or so by a landscaper because my job and hobbies kept me busy. Things have slowed down now and my landscaper has relocated so I pulled out the old Scotts which I have kept in good working order in case something came up and the landscaper couldn't do the job. He was also cutting my neighbors yard too. So my neighbor needs someone to do his yard as well. So I figured if I cut his yard and pickup the 80.00 bucks he is willing to pay a month (two cuts)I could use it to pay on a new zero turn. The landscaper used a scag and it was fast and did a good job. I want the best bang for the buck but also best for my needs, only mowing about 1.5 acres including the neighbors. So ive been searching and researching every brand of zero turn, started in the 4k range till I read the 14 pages of reviews on the husky MZT52 so bumped it mid 5k. I want top quality and the best in high end residential, low end commercial I can get for the price range listed. So far I've narrowed it down to the MTZ52 for 5500.00 otd, or a Hustler SD54 for 3700.otd.(both coming from local dealers) I really like the huskys better transmission's (3400), cast iron spindles ,rops and FS kawie, over the zt2800 and FR kawie, alum spindles, no rop in the SD, but do I need the upgrades? open to any opinions on these two machines or suggestions of other brands as long as they fall within the price range no higher than the husky, sorry for the long wind. thanks Dave