I got White version. I was getting the game at the same time with 3 of my friends. Out of these friends, 2 were planning on Black and 1 was planning on White, so I tentatively decided upon White to even it out. Then, when I looked up the version differences, I was sure I wanted White. The White Forest just completely outweighs Black's exclusives, in my opinion.
The only problem is that I'd much rather have the Fire Dragon... But so do all of my friends, so no chance of trading (except for Pokédex reasons). Oh well.
Now one of my other friends, who has yet to get the game, can't decide. He wouldn't be evening out the version count among us, and he'd prefer to have Reshiram as well. But he agrees of the value of White Forest over Black City, and he likes the sound of triple battles over rotation battles.
(None of us have gotten to a triple or rotation battle yet in our games, so we don't know what's better/cooler. We're all intentionally not looking up stuff so we enjoy our first playthrough by finding stuff out on the fly.)