To the OP: You began with saying, "Both would be overkill".
You also mentioned your wife and her preference for keeping within a budget.
You mentioned limiting your size due to gates, shedding, etc.
From all that, I'd say keep your money. If the BX1860 is overkill, then so be it. You are gonna love it!!! I love mine. Want to see it work?
YouTube - DSCF1634.AVI
YouTube - BX1860 Working II
YouTube - BX1860 Working
Are those larger tires? Looks like they are. Thought you could not get the larger ones to fit??