Cheap tweaks...What would YOU reccomend?

If I might be so bold as to suggest that you replace those innertubes with Roller Block jr's under your components and spike your speakers. Here's hoping your speakers like higher resolution.

A comment about a speaker tweek lifted from another forum-

"Sorry if I didn't make this clear. Longer waveforms are wrapping around box speaker enclosures and being reflected later in time by room boundaries and such. Hence, a reason for room treatment. Shorter waveforms higher up in the frequency response and produced by your tweeter are first interacting with and being diffracted by the baffle and edges of your enclosure arriving just behind the pure signal at the expense of proper time and phase arrival. This would be damped and diffraction eliminated by what I make. The example that previously appeared in my avatar was on a Dynaudio Confidence C4 speaker. I custom fit to a particlar speaker. A Revel M22 appears in my avatar at present. Here is a link to an animated illustration of diffraction in action. You may be able to imagine what you would be hearing without those green and red circles- http://www.silcom.com/~aludwig/images/diffdem.gif

Speaker designer John Dunlavy wrote that the phenomenon known as listener fatique is the direct result of time and phase malady. I observed this to be true in the design stage for myself. The more obvious benefits are improvements to how instruments are rendered and sound. Questions?"

That link is pretty revealing of the subject and this would be my recommendation.