I have a JD GT235 with a 44" Berco front snowblower, 48" deck. I just bought a BX2660 with FEL, 60"MMM, 51" front blower and cab. I love both just depends on how big you want to go or budget. I would look at front blowers throw it once and never deal with it again also clean lines and no spring lawn repair. Look at dealer service that is the key. I drive past many dealers to get to both mine because they are worth it.
Many have mentioned buying based on dealer. I like my local dealer, but when it came to buying they were no help. When I can buy from Barlow's in KY, and get it shipped to CA, and still save $4,500 over what my local dealer charges, well you get the picture. I am going to be buying a 5' KK tiller from McGee Farm equip. in MS, and will save $1,000 over local dealer because they just don't want to deal.
From a different perspective: You say you have four acres and all the landscaping is done. Four acres of landscaping is one heck of a lot of landscaping so is it safe to assume there is some measure of your property that is still not landscaped? What are your plans for that section, is that where all the grass is? Any plans to expand the compound? Build? Level? Trim? All jobs for a small tractor.
I have three acres of landscaping on a 10 acre plot. The wife is into gardening of all types, president of the local garden club, all that. One thing I know about most large gardens - and I don't know about yours - but for people who like gardening and landscaping, the job is never done. Plants and trees are always dying, being planted into wrong locations, over-growing, under growing, plots and beds are ripped up and evolving. A true garden is a thing of constant change. Very few people keep the garden status quo. My B21 is the best thing I ever bought since it is small and gets into tight, already-landscaped, spaces. It is strong for hauling DG/compost/logs/landscape rocks - all thanks to the FEL.
You might consider resale value too. Small tractors usually sell the first day on Craigslist, ask anyone who has tried to hunt a good, used one down.