Upgrade question
 

I currently own 089 088 911mk3 and B80 mk2.

I am thinking of an upgrade. I can only upgrade 1 piece of equipment. Which of the following do you think will bring the biggest improvement in sound quality?
1. 069 driving 911 directly
2. 069+088
3. 808+089
4. Add another 911 running dual mono
5. Sell b80 for BA7.1

B80 has to go in my opinion.
And may be not for BA7.1.
Of all Burmester products I tried I was least impressed by the speakers.
Toga