The Vibe's shock towers are very close to the firewall (very little flex) so a strut bar is mainly cosmetic. I have a DC Sports strut bar and paid $76.00 US. A better investment would be a Progress rear sway bar and a set of Teins S-Tech springs.
I have one and it looks nice, did not notice any diffference though.
03, Abyss monotone GT, 6 disk changer, moon and tunes, Cargo mat/nets, power package, side airbags, AEM Short Ram Intake, Borla exhaust , 35% tint all around, F1 strut tower brace, debadged, 17" Excel rims w/ federal ss595 tires.