who to book through for US flights?

I'm planning a little southwest USA holiday this year... in the car, not bike as SWMBO won't get on a bike with me

Have any of you got any recommendations as to who to book the flights through...
so far I've been looking at:
ebooker,
Travelbag (they seem to be part of ebooker),
Airline Network
Expedia
LastMinute.com

Any thoughts? I also want to book a hire car. The plan is to fly into/out of Phoenix.

Thanks
Derek

Gulf Air .....they're not likely to take down one of their own are they

Flights

Try looking at these sites which if I recall have links to appropriate booking sites

www.cheapflights.co.uk/ and www.traveljungle.co.uk/

Mike