Humm, I'll give you my 2¢ worth. I got no beef with Lee or RCBS but if you're on a tight budget the LEE Anniversary kit for $140 is a pretty good deal. The drawback is you probably will upgrade the scale but even with the RCBS kit, you will most likely get a digital scale eventually as well. The powder measure on the LEE is 90% plastic. It works and fairly good with most powders within 0.1gr accuracy on average for me but not very smooth to operate. Some fine powders like H110 or Bullseye tend to leak. For stick powders, it works great. Eventually you will end up upgrading it to a RCBS uniflow or something similar.
What I do like about the Lee press is the priming system even though it's all plastic, it works pretty good. The Quick Change bushing system on the Lee press makes changing dies on the fly super quick. Almost like having a turret press.
What I do like about the RCBS kit, the 505 scale works really well. The uniflow powder measure is solid and a breeze to work with. Not a big fan of hand priming but I'm sure it's good exercise for the hands. If RCBS had a quick change system for dies on their single stage press....
In the end, if I had to buy over again, I'd probably end up with the RCBS kit.