Hey man im on a b60 and has been running problem free for over a year now
i dont think ive ever seen someone with a b60 having the sleep of death or random reboots. The main thing is to get a SBK1, some b70's and everything under (b60,b50 etc) will be SBK1, every thing over is SBK2.

 

Most work well as the updates have fixed ALMOST all issues.
If you plan on getting a dock you want one that is B8O or higher as below that there was a battery drain issue, it may have been fixed if the previous owner sent it in, but no way to tell until you use the dock.