Upgrade B&K Ref 20 to Proceed AVP?

Sorry to be getting back so late. Been out of pocket.

Really appreciate the input but, as usual, he who hesitates looses. Missed the deal so am back to looking for a good processor.
System:
B&K Components Reference 20 Surround Pre
Denon AVR 2802 Surround Pre
Arcam Alpha 8SE CD Player
Bryston 3B-ST Amplifier
Harman Kardon PA-5800 Amplifier Rear and patio speakers
Gallo Acoustics Anthony Gallo Reference 3.1 Speaker L/R fr.
Sony KDS 60A2020 Video
I am still considering the Proceed and have been looking at Anthem AVM20.
At this time the new formats do not interest me. Prices are high and material is scarce. Main interest is 2 channel. The room correction is of interest.
My room is 26'x 22' with cathedral ceiling. System is in the middle of the long wall with listening position 12' from the tv. Left side looking at the system has a brick fireplace and the right side is open to the kitchen. Rear wall mostly glass.
So, what benefit will I see with room correction? Does it really make that much difference that a person should go that way rather than a higher end processor?
Thanks again,
Steve

Appreciate your taking the time and giving your thoughts. As usual I ended up waiting to long and missed the deal. Always figure that it wasn't the right time when I miss something.
I have also been looking at a theta casa nova but with Flmlamb mentioning the room correction and seperation on the newer models it is making me think a bit more.
Current 2 ch is
arcam alpha 8se
ref 20
bryston 3bst
gallo 3.1
I do have some room problems in that it is the family room and there is not much I can do for correction.
What would be a good processor used that has the correction software and will the correction represent a bigger step up than a very good older processor?
Thanks again.
Steve