If your paying the same for 6.0 as a N/I 20 ,the 6.0 is OVER priced. They are both race boats as said before. Light air family cruise is possible but like Tad said you'd increase your sailing options and decrease your maintenance and repair costs with something like a hobie 18. If you have any inkling of racing get the N-20.
I would look at it like this, say the 6.0 was a 90's vintage Porsch 911 that has been pampered all its life vs. and the Inter 20 a newer Ferrari that has been used and abused, raced and raced hard while being marginally maintained. My decision would be to go with the boat in better shape.
Which would you buy?
