my guitar partner has a NF3 and loves it. it's now his only guitar. i had a mccarty 25th NF and loved it, BUT, hated the jumbo frets. sold it, bought a 07 mccarty and put 2 narrowfields in it, and love it to death. you cant go wrong with either one, but i know the NF3 is gonna be cheaper.
ps- by the way, they will sound different. the mccarty nf will be brighter sounding than the nf3, but the nf3 will be more versatile.