Roadapple,
Do not make the mistake of thinking that the 23 HP 2210 is more tractor than the 4010 with 18.5 HP. In many cases including Fel and 3ph you will find the 4010 to be the "bigger" tractor of the two. On the other hand, if you are going to be using the rear PTO for much of what you do, the 2210 will deliver more power. Take it for what it's worth (I own a 4010), but I think the 4010 is more tractor for the money. My uses include mowing 3 of my 7 acres, maintaining a 500 foot gravel driveway using a 5 foot box scraper, clearing snow with the Fel and using the boxscraper and the my 50 inch mechanical tiller to reclaim more of my land and turn it into lawn. I have not run out of power with this machine--I will always lose traction first and I've done some serious work with the box scraper. The area where I have maxed the tractor out is the Fel--this is an application where the 4010 has more capacity than the 2210.
Also--there has been some discussion on this site as to what size box scraper you can effectively pull with the 2210. Most are saying 54 inch would be the max. Check with your dealer to be sure.
Lastly--regarding tires--we had 12 inches of wet snow last week. I cleared the driveway with turf tires and ran in 2 WD half the time. While I will use the tractor for projects where I wish I had more aggresive tires, the vast majority of what I use the tractor for is related to maintaining my lawn or driving over the lawn and I wanted tires that would do the least damage. We have sandy conditions and I think the more aggressive tires would do a lot of damage.
Not saying the 2210 isn't a good machine--just make sure it's the right machine for you. I've looked at the 2210 when I had my tractor in to be serviced--for my needs, I'm glad I got the 4010.
Good Luck
Bob