Called my dealer up where im getting my sled, both of them are in, I COULD upgrade to a 700 if I wanted to, should i go upto a 700 from the 600??

what is the price difference.

without a doubt I would upgrade...
it's a little more load to throw around than the six...
you most likely won't notice the difference the six will keep up with the seven in the trail, you should be able to pull away on the lake should is the operative word.
The power is all in the thumb brother, you might not use it but it'll be there when you need it

i like that piece of mind.

Go with the seven sometime a little more power comes in handy, like when your in the powder or trying to stay ahead of your buddys on the lake. JMO

More power, better on gas, and faster across the lakes, what more could you want. Go with the 700