New Breaker Box-Should I upgrade?


I currently have a box rated for 150amps. It has gotten filled with all my dedicated audio lines. Though not an issue currently, I am thinking of upgrading to a 200amp box. If I do, it means a significant expense in moving things to the larger box. My electrician thinks it is unnecessary. For me, I just want to have the ability to add new lines, when needed.
So, the questions are:
1. Should I bother, when everything still works?
2. Would a larger capacity box provide me with a better supply of current that would, in turn, improve my dedicated audio lines?
Bob
gdnrbob
Just for info twin breakers are not allowed in all panel boxes. I would assume your electrician knows this, there is usually a diagram on the box showing how many and where in the box they can be used. 
I looked into that as well, was told I would have to change out the lines in the house to accommodate the higher voltage......was to expensive.  just going to get a new more updated, bigger box...150 is enough I find.

@kennesawjet ,
Yes, I was hoping to do the same, but the electrician said a larger box only came with a higher amp capacity.
I'll be leaving things alone for the time being.
B