First of all... Black bar? are some of you seriously complaining about that? How about this, consider it a badge that says "I payed more" if you're really vain enough that it matters.
I travel a lot so for me the 3g is much better. GPS alone is worth the price of admission here. As for the wireless, sure there's plenty of places that have it free, but I hate having to search for it everywhere I go. I will use this from the car quite a bit too (not moving of course, besides the GPS). I'll be in Disney world next week and I can tell you there's absolutely no way I'll be able to use the wi-fi only one there on the resorts. Been there, done that. 3g or expensive wired is all they got. Even at the various offices I travel to, they are locked down to wired only or a strange wireless protocol that the ipad can't access. Again, 3g is the only answer there.
The only downside I see is price, and if it's a lot to you and you don't travel a lot, then fine, but a black bar or fingerprints is not a factor against it