I HAVE AN OPINION.
Several... really. I think that Jesus would be our Messiah even if he was married, because I know of no prophecies in the OT regarding his marital status at all. I can think of several really good reasons why He WOULDN'T, however.
1- With the mania that surrounds the things of God, taken wrongly, (ie: The people of Israel worshipping the brass serpent) Jesus might not be keen to 'endorse' anyone by virtue of familial association with Him. He distanced Himself (a couple times) from His own mother, and she was improperly venerated nonetheless. What would have been done with his wife (or wives, I suppose) and potential children? And there would have been children...
1a because the earliest command given to man was to be fruitful and multiply. If He had been here to take women to himself and as eager as He was to fulfill all righteousness, he would have likely started a tribe. And I don't think our Lord would have been impotent... nor would barrenness stand in the way of the man who orders dead friends to quit being so lazy and get back to their homes.
2 And would those children be sinless, like FollowingHim says? WHOOOOAAAAA NELLIE that would be intense, but we have no record of any other sinless man walking the earth. And if they were born into sin, then we have an idiomatic problem because God, for the first time, begat that which was sinful. no thank you to that!
3 Speaking of idioms: The Church is the Bride of Christ, yeah? It might be damaging to that picture if there were actual women who could also claim that title independantly of saving faith in the Messiah.
4 Unequally Yoked. Massively unequally yoked. Any woman He could have married would have been, as yet, un-paid for. And along with that would not have recieved the gift of the indwelling Holy Spirit, as it was not given until Pentecost. The bride-price He came to pay did not get handed over until His death. What fellowship has light with darkness? He desires a bride without spot or blemish, what earthly woman would even be an adequate picture of that?
But I am in agreement with the overall conclusion that even if Jesus were married, as long as He died on the cross for my sin and resurrected on the 3rd day as the Scripture says- then He's the guy I trust in, whatever else He did while walking the earth. Lord knows I'm always a little bit wrong about everything anyways.