I agree that the VQ35 is a bad ass motor, my maxima has one and with the 6 speed it really moves. Swapping in a vq35 is probably do-able since they come in pathfinders. However I say since you have experience doing custom turbos, why not just turbo the vg33? Just do it! Prove all these guys wrong and make it happen. Its a good idea, build it for torque and make your X quicker, it would help whether you are on the street or the trail. Just because its faster doesnt mean you are trying to make a ricer street racer. I get that. I would do it to mine if i had the know how and the spare change. More power is ALWAYS better, no matter what you use your truck for.
And anyways, "street trucks" can be fun, my brother has one... a 05 hemi ram lowered 5 inches (the right way) with ALL new suspension, springs, shocks, f+r sway bars, etc., it has 400whp and almost 450ft/lbs of torque.... It drives amazing, and will definitely pin you back in the seat. Plus i just towed my 3300lb maxima over 400 miles with it, and you couldnt even tell it was back there. It is still a truck, just a fast, fun one