Hi Glenn,
I can understand your confusion. I have been running SME/e-smith since ver4 and have also been confused as to wich way to go. It all depends on your point of view.
I have replaced a server running a custom 5.2.1 upgraded to 5.5 with a new server running quad xeons,5 18g scsi, megaraid controller, etc. Why ? Because I picked up the server for under $1000. I needed megaraid support so the only one that would work was 6b3. I have installed it with patches from contrib.org, and at this stage it is running really well, no errors or problems. It supports about 15 users and motors along really wel...The only catch was that as the previous server was heavily customised, the upgarde was a nightmare, but I eventually got through it.
Regards,
Karl