Here is some fun, I have the Lyman (gen I) while my father has the RCBS combo. If I had it to do again, I would go with the RCBS. My Lyman takes a minimum of 30 minutes to warm up, I have a hard time keeping it zeroed (I'll have to check the lights) and If I want to use the scale only, the powder spout gets bumped constantly. On the up side, it is faster than the old spoon/beam scale method and I don't have to hunch way over to read it as I am trickling powder. It also beats trying to throw charges of stick.
Now, my dad's RCBS warms up faster (about 10 min.), has a faster dispense time and we can detach the scale for independant weighing.
For the extra cost I personally would go with the RCBS Chargemaster combo.
Will