Well, I did more "indepth research" and some rough calculations based upon Snowtoy, Gillesdetrail, the others who posted their experience with going to lower gears in the 3rd member - higher gear ratio (4.10 to 4.56 ring & pinion).
It looks like I was wrong in my thinking. 
YES, it looks like if I swap 4.10s to 4.56s, it will put the RPM at 50, 60, 70, 80 MPH in 4th and 5th gears at a higher torque number (based on my desktop dyno software) within my usable the RPM range.
Gearing is always a great gain for the buck, like its been said, run it that way for now and see how you like it, it may be perfectly adequate for what you want, I just wouldn't expect much more than a stock fresh setup on stock wheels and tire. But if you put in 4.56 or more it'll be a beast I'm sure. I run 4.37 on 31'' and I like it, I would like to run 4.88 gears on 31'' when I'll have a 5th gear.
