[CA] [CA11] Which ACU?

[JP460]

I am in the process of upgrading the electronics on a twin diesel cruiser, LOA 50', 35,000 lbs loaded. The current ACU is a "150G' with a ST7001 head and a type 1 hydraulic pump, and 12V system. No power steering. It has worked well for many seasons.
The upgrade will include Axiom/Axiom Pro screens and SeaTalkng, radar, weather, etc. so I want to move to the Evolution A/P as well.
I had been looking at the EV-200 (T-70156) and met with a local installer today who suggested the EV-150 system instead (no pump required). I believe the order# is T-70407 but I cannot find that in the Raymarine website.
Questions:
1) Is the core pack without pump available for the EV-150?
2) How can I decide between the EV-150 and the EV-200?
3) Is the boat too large for the EV-150?
Thank you for your help.
James