I'm also a bit prejudiced to Episodes IV-VI since that was the original version I saw, but in the spirit of fairness I'm going to reserve final judgement until I review all iterations of it again, including the latest trilogy... I'm a pilot in mindset, so the one with the best stats would win out over aesthetics if it's a big enough difference. So I'll have to look and see if it got any legitimate upgrades that factor in over the decades.
By that reasoning, I believe Han's still wins. He made "a lot of special modifications himself" in order to make it better than the original, and the modifications made by Unkar Plutt and the rest who were in possession of it before Rey steals it caused a lot of issues.