Just remember the Comfort seat is a little taller than the stock seat. I'm 5'11 with 32' inseam and the 700 with comfort seat is perfect for me.
I bought the 700 as 90% of my riding is on tarmac and I don't plan on any single track. It feels fine when I have the Wife on the back and she finds it really comfortable, but then again she's comparing it with my DR650 which was not a good 2 up bike.
The only gripe I have with the comfort seat is I feel I need to be sitting an inch or so further back for the maximum comfort, trouble is I can't reach the bars then so maybe some adjustable risers to bring the bars back a little would sort this out.
It really comes down to size and frame of the rider though as one guy on here reported he felt he was sitting to far back on the comfort seat! I guess its hard to make a seat as a one size fits all.