After watching the Grand Championship mini-arc again sometime ago, I have to say it's definitely not as good as I remember it. Granted, the idea of Kaiba Land and all it entails is amazing -- just the fact that there's a duel robot with Yugi and Kaiba's strategies/decks is enough to get me through the door. The arc falls apart with its characters and animation, though. I can't for one second take the group of duelists in the tournament, the supposed best in the world, seriously. They're goofballs and cannon fodder, which is hardly what could be said about the likes of Strings, Arkana, Rafael, Valon, etc. The people in the tournament never posed any threat to Yugi, even without the God Cards, and it wasn't a pleasure watching as these wimps were futilely hyped up as anything more than wastes of space.
And boy, the animation got terrible at some points, specifically when Kaiba dueled Zigfried. What in the hell happened there? It's comparable to DB Super's atrocious episode 5 animation. You'd think they'd treat the best duel in the arc, with the tournament's creator in it no less, with a bit more respect, but the way it is now makes it appear as an afterthought when the budget got low.
Battle City and Orichalcos are pretty much tied for me now.