I'm trying to cure the blues by blowing some green, but I can't figure out how. Usually I spend it on my car, but I don't know where to go from here.

In the last few years, I've replaced:
- Shocks/struts (Sachs gas)
- Front and rear springs (stiffer)
- ALL bushings (poly)
- Mounts/belts/filters/thermostats/etc.
- Ball joints/tie rods(inner and outer)
- Brake pads/rotors/master cylinder/rear calipers
- Exhaust (still not happy with that mess)
- Tires
- Carpet (floor and rear deck)

I've added:
- A cam w/ adjustable gear
- IPD sways
- Upper and lower chassis braces (home made)
- Stainless fender trim
- 144 chrome mirrors
- Pioneer two-way speakers (5.25" front, 6.5" rear)
- Blaupunkt digital media receiver
- Neat switches which nobody else knows what they do because they're not labeled

I can't think of where else to go with a daily driver. Maybe if it was a garage queen, I'd think about a paint job, but it'll only get stone-chipped and faded again, and it doesn't look too bad yet. No other performance goodies catch my eye, though if I could get rid of some squeaks and tighten up my rear end without making the ride harsher, I'd do anything. I would have ponied up the $130 for new seat bottom foam from Volvo, but they discontinued it. E-codes are mildly tempting, though I don't like what I hear regarding the fit and finish of the DJ Autos (all I could afford).

Hmm. Any suggestions?