For an 05+ I'd go at least 4.10s or just leave it alone since the stock gears are already 3.55. IMO it wouldn't be worth the $ to install 3.73s.

Anyways here's mine:
K&N drop in w/o the silencer
dumped Magnapacks

Eibach Sportlines
KYB shocks/struts
poly swaybar and steering rack bushings