Looking at buying a NVP3500 SL, also looking at a 4x4 package, any advice is welcomed. We are currently a family of 6 with possibility of more. Looking forward to reading on the forum and getting some great ideas for how to make mobilizing my family practical. Also does anyone have opinions of advanced 4x4 vs Quigley, I am much closer to advanced 4x4 but curious if there is a Quigley advantage? Thank you all! D