Thanks to all.
I've read that the RCA clear top I'm using are considered clear and not tubey. Last night, the system sounds amazing, and my initial feeling on this pre may be wrong, I have to listen more to know if I need to change tubes at all.
As I said in my previous post, all these recommendation is great because I will use them in the future, my listening preferences do change from time to time. FIY, just added pics of the new preamp to my page.