What do your hard-earned dollars go toward?

After finding the "perfect" system within your budget, how do you then tweak it for maximum performance?

1. Mechanical isolation e.g., racks and footers

2. Electrical isolation e.g., power conditioners, power supplies and dedicated lines

3. Acoustic isolation e.g., room treatment

4. My system is just fine out of the box and I would rather spend money on more music

5. Other