Best Tweaks.....

1- Neuance platforms
2- Quality powercords. I'm only using Shunyata Diamondbacks and Copperheads, far from the most expensive, and still the improvement was stunning!
3- Balanced power supply for CDP and turntable. Keep them on separate filtered outlets though so the CDP doesn't pollute the TT.
4- separate dedicated homerun electrical lines with quality outlets (FIM, Furutech, many others).

Velodyne SMS-1, no question about it.

Thanx,
Russ

Go the the refuse can of a granite or marble company. Use the pieces of stone to mount your components on to. Good for vibration and other issues.

The best tweak by far for me is QuickSilver Gold from Xtreme Cables.........Here's some feedback. http://www.audioasylum.com/audio/tweaks/messages/125613.html

Stop by your local granite shop (could be to the gravestone maker himself)and ask for 3cm thick remnants, which are usually no to little charge. Purchase simple rubber / soft plastic, self-stick bumpers at your local or big box hardware store (the kind of bumpers often used on kitchen cabinetry doors). Apply the bumpers to an appropriately sized granite slab and place atop and beneath your speakers, atop and beneath your equipment. Experiment with this simple idea and you may be surprised how much this helps isolate components and clean up the sound for basically no cost. And if you find the right remnants they will look killer with your gear.