I'm using 44.67 without issues. I think 44.71 is of no use unless you have a GRex. As for 44.69, the changelog doesn't show anything of significance. Ultimately, it probably doesn't matter which you use 
As far as I recall there were some changes to SCSI LUN settings in the very latest versions. The very latest version is what I run on my systems and it is fine.
Obviously flashing always carries some risk, so if your system is working fine maybe you should not flash.
