What are you looking to do with the sled? Ride the mountains? Ride the flatland? We need some variables before we can comment. What about a budget? Fill us in and you will get a ton of replies I am sure.
My personal opionion, stick with a sled with EFI. I love my doo but seeing the Polaris and Cat's with the fuel injection makes me wonder why Doo doesn't have this system on the 800's.