Hello, Sergio! Welcome to AC.
I used to live in Virginia (Norfolk) and after that Beaufort, North Carolina - both watery places, though not so much as yours.
I am using a Bryston 4B3 with my Janszen hybrid electrostatics. I recently added a Torus Power RM20 to filter the power going to the amp and protect against surges (I believe you have a LOT of lightning there). Though I have always been skeptical of power conditioners, and some I've tried I didn't like, I found the Torus unit worked very well with the Bryston, increasing liquidity and ease of the sound. So, you might try that some day and see what you think yourself. I know that now, I would not be without it.
Have fun!
Mike
Except for the front panel and slightly lower cost, the Torus Power RM20 is said to be the same as Bryston BIT 20.