Originally posted by stingray454:
Tires & Wheels:
Focus SVT Wheels 17" X 7" 5 spoke
Street tires: BFG G-force T/A KDW 215/45/17
Auto-X Tires: Kumho Victo Racer V700 225/45/17
Suspension:
21mm rear sway bar w/ urethane bushings
Front strut tower brace
Rear strut tower brace
BAT Strut & Spring kit
Strut mounts front & rear
Tie rod ends (outer)
Front sway bar end links
Front sway bar urethane bushings 20mm
SVT motor mounts w/ H.D. inserts
Exhaust:
Y-pipe aluminized w/ high flow cat
Borla SVT Stainless dual exhaust
Brakes:
Wilwood 4 piston kit w/ cross drilled rotors
Headlamps:
new OEM replacement
Now, the problem is all these mods total to about $5,300 
Well, I see your point. I like the Infiniti G35s
but I'm definately Contour Crazy. If you're ok w/ the Contour's power, I'd say your two exhaust mods are going to make you grin.
As far as cutting cost, you might consider the Focus SVT brakes (not as light as the Wilwood, but should work well).
Also, some of your braces (eg: front strut tower brace, etc) may not be necessary and could cut cost considerably. If you're looking for great handling I'd say the BAT kit w/ the 24mm hollow "Aussi Bar" (rear sway bar) and it's improved brackets are the way to go. Also, at 120K replace any worn parts/bushings. The BAT kit, the aussibar, and the new parts/bushings should dramatically improve your handling...I'd go w/ those mods as a starting point for your suspension work.
Hope that helps!
