I'm pretty quirky when it comes to what I like in a car. Beyond the really cool extras (voice activated nav system, heated seats, etc) my most favorite accessory in my car is my flip down sunglasses holder thingy. It's so trivial but I haven't scratched a pair of glasses since having it.
I guess my point is, if cupholders is your thing, how about looking at other cars that have all the same features you want but with bigger cupholders? I was set on a VW but the seemingly trivial things in my Honda is what sold me.