opinions on posi brands?

[RapidRide2]

I am going to be rebuilding my 83' gmc rear diff. soon. I am going to switch from a 2.56 to a 3.73 posi. What are your opinions on factory gm,, auburn,, eaton,,, and richmond powertrax. This truck will be street driven with about 300 h.p. I want good street manners fronm the posi yet reliable and strength. I only want to do this once. p.s. has anyone ever retrieved a rearend from a junkyard with good success????? Thanks in advance. Matt