changing overall tone

..another thought.... Use headphones. You can get state of the art sound very inexpensively. Check out www.headphone.com

What phono amp are you using? The rest of your system seems to be good products for the money. I would definitely agree that you should not be looking to wire to help make the system sound better. Audioquest is a respected brand.

Stringreen's headphone suggestion is an excellent thought. I like my system, but it's in a difficult room (you know, wife and kids involved).

A sub-$200 pair of headphones (eg Grado SR-80 or 125) can add a new dimension to a mid-fi system; I love my SR-80's.

On another note, don't those Dali's have the twin tweeter? I'm surprised you find them "neutral to dull sounding"; I more often read of them being accused of being too bright.

Goertz AG series speaker cable will definitely add more high end tilt.

Aren't these speakers supposed to go with a sub?

You may be missing the oompf of the bass and therefore it sounds lifeless.