buying a new bike - help !!!!

I'm just getting back into road cycling after an absence of approximately 7 years - and my dilemma is deciding on which bike I should invest my hard earned money into - I've set the budget at $3500 AU which will includes shoes & pedals (if not already on bike), floor pump and a couple of other incidentals. I've come up with 3 possible options at this stage and would appreciate any feedback positive or negative about the following bikes

Trek 1500 - which comes in @ $2800 (no pedals)
Giant TCR - $2800 (no pedals)
Avanti Corsa - $2900 with pedals