want to buy bike, need help

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hello everyone! i've been a member here for a little while, though i've spent more time browsing messages and improving my knowledge then actually riding, as i am currently without a "working" road bike. But i have finally decided the time has come to buy a bike, and with my very modest budget, and a little advice from a few of you (hopefully) i will have a bike relatively soon.

my budget is AU$1500 and i've been thinking of tiagra/105 groupset, with carbon forks. a triple chainring would be good, as i'm not a very powerful cyclist yet, but that isnt too important really.

i would like to use it for training in the mornings, for the 2007 alpine classic, and would also like to purchase clip-on aero bars as triathlons are something i enjoy.

i am 6 foot, 15 y/o, fairly broad, and would like a relatively good quality bike, as i would prefer to be able to keep it and make upgrades, as opposed to buying a new bike in 3-4 years time.

Please help me out, you guys seem to know an awful lot more than i do.

anything i've left out, please mention, and i'll repost.

thanks heaps,

john

where in aus are you? I reckon you'll be fine on your own as long as you do some test riding..