G'day Mate and welcome to TBN from Downunder.
Is this the 4110 you're considering:
TractorData.com John Deere 4110 tractor information
Honestly, before anyone on TBN can answer you we'd need some more information about your 7 acres (terrain, slope, gradient, etc..). We'd also need to know what tyres it has. (R1, R4, Turf?) Does it have a Front End Loader (FEL)?
It really comes down to what the heaviest task that the tractor will be used for. According to the linked specs, the 4110 is a 20hp tractor whereas my JD 4105 is a 41hp.