Recomendations Please

I too have never thought of the Vandersteens as being bass shy, especially at their price point. I do feel that they are very room sensitive. Adding a Vandy sub or preferably two, would be the most obvious solution to your dilemma. FWIW, it seems to me that you've put together a really nice system there. At the risk of stating the obvious, I'd suggest playing around with speaker/listener placement before doing anything else.

Guys thanks for all the advise and The complement Usound. Speaker placement could be a problem I have the speakers almost 2 feet from the wall and agree that I could tinker around but apartment living could be a cause of the issue too. maybe I am just getting used to the sound of the tube pre vs my old solid state pre. I have the speakers slightly facing inward toward the center of the listening area perhaps if i turn them so they just face forward that would be better. I would pull them a bit more from the wall but then they are a bit too far out in the living room. I think the real solution is a listening room and getting a better source to play my digital files. for the time being i just have a USB dac that is very primitive. could be a problem as well. for the time being I will try something new with the speakers and I did just get a quad set of amperex orange globe tubes in so i will see how they sound.

Try Cardas cables. Im sure they will give a better overall tonal balance and you might notice tigher more focused bass. I have a similar system and have used Audioquest and Cardas Hexlink- Cardas wins by a mile, imho.

Don't the amp is the issue. Room optimization first. Then a move to the 3A Sig, if that doesn't quite do it for you. Not sure the 2wqs are really about more bass, as much as increasing sense of space and better mid-range performance by removing deep bass from the cabinet, also more apparent power from the amp is it would work much less to drive the 2ces with the deep bass handled by the 2wqs amp. But first play with placement before you do anything - the 2ces are not bass shy speakers.

If everything suggested doesn't quite get what you want, you might want to try a better power cord for any of your components. A very inexpensive choice would be Shunyata's latest entry level cord, the Venom 3. I'm no dealer and have no vested interest in recommending specific products. I've just tried quite a few pc's and NOTHING touches this at the price point. You'll hear an immediate improvement in any system as good as the one you've described.