We have both in our family. They are quite different cars. If you are doing long trips, go for the 6. The longer wheelbase and heavier body is a much better ride and AWD just refines it for handling and safety. If you're stuck in urban areas, the 3 might be the way to go, if you don't need the extra room or boot-space. That said, I use my 6 mainly urban, but love it when I can get out on the open road and away from the turkeys, when it shines as one of the best tourers I've had, and that includes many exotics and far more expensive cars.
But eventually, it will be up to what your soul tells you, not us.
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18