What did you pick? Why? Are you happy? Do you wish that you picked something different?
About four years back, after saving up a wad of cash, I had the chance to pick out my "dream" rear axle assembly. My vision for my car was to make it as fun as possible on curvy back roads, probably take it to the autocross at some point, and to generally make it exciting and engaging to drive. To me, this usually means higher revs and lots of shifting.
With that in mind, I chose a mechanical limited slip (Eaton Truetrac) with 4.10 gear ratio. After living with it with two different engines and two different transmissions (just did a 4spd swap), I am not sure if I would have been better off with a lower numerical (more highway oriented) ratio. The main problem seems to be the lack of an overdrive gear and engines that don't exactly love to rev. The two 5.9s I have had tend make their power down low where they don't need as much help from the short gears.
My current engine is a Blueprint 408 stroker making about 460 at the crank driving an A833 4spd with stock ratios. There's more than enough power to overwhelm the tires in almost any gear...at least with my 255 no-season BFG T/As.
Would it be more fun with 3.23s or 3.55s? I just don't know and experimenting is outside of my budget currently... I'm hoping to learn from you guys before I invest.