Ha, Bip Bop II is actually one of my favourites *because* of the voice acting, amongst other things. There were other voice actors apart from Ross and Magda too, which sets this episode apart IMO. Yes, it was pretty cheesy, but so was the game story, in a hilariously overdone kind of way. Ross is at his best when he's that immersed in the game lore and his own imagination/interpretation is in full flight.
Other favourites of mine in that vein are Super Cult Tycoon, Bozo's Night Out, and Puzzle Agent.
I actually haven't watched any Game Dungeons since Mage Knight Apocalypse, and I'm not sure I even got through that whole episode. I much prefer the old, shorter format (with a few exceptions - The Cave World Saga is lots of fun) but I fully intend to catch up on them all. Soon.