Thanks erik, what I mean more bass I was refering to quality sounding and control. Not just just a bloat out bass or more bass. I like bass to sound natural with articulate, define bass.
I do have a sub in my system and yes it can be hard to optimize it properly but right it can achieve great results. Yes room treatment is one of the most important tweak in a room which I am trying.
Oz, thanks for your suggestion. I never try tubes in my system. I will think about it.