I've been thinking of asking for an external flash (for canon xti) for christmas from my parents, the only problem is they only want to spend between $120-$150 so basically any canon brand flash is out of the question. I have no idea what to look for when it comes to a decent flash so I'm turning to you guys for help. I/they would prefer to buy from a local store so I'm kinda stuck buying the quantaray brand from ritz, would any of those flashes be worth it or should I just hold out till I can get a canon flash(430ex)?

Link for ritz camera
Flashes for Film Cameras - RitzCamera.com