I have the 100.5's and 30.5.
First, does the needle on your 30.5 stay still or is it bouncing around?
If it's bouncing, maybe moving up to the 60.5's would be beneficial but I don't think day and night.
If it's not bouncing, I would urge you to think about getting the best preamp you could afford. I found great synergy with Conrad Johnsons newer preamps (CT-5 and ACT 2.2). They are: tube,class A,zero feedback,no cathode follower,only "one" gain stage,teflon capped preamps. Designs are great on paper but I can say they sound great with my Pass's. The CT-5,used,should easily be in your price range.
I haven't heard the Esoterics so I can't comment on how much improvement going to separates would be. Good luck.
First, does the needle on your 30.5 stay still or is it bouncing around?
If it's bouncing, maybe moving up to the 60.5's would be beneficial but I don't think day and night.
If it's not bouncing, I would urge you to think about getting the best preamp you could afford. I found great synergy with Conrad Johnsons newer preamps (CT-5 and ACT 2.2). They are: tube,class A,zero feedback,no cathode follower,only "one" gain stage,teflon capped preamps. Designs are great on paper but I can say they sound great with my Pass's. The CT-5,used,should easily be in your price range.
I haven't heard the Esoterics so I can't comment on how much improvement going to separates would be. Good luck.