Opinions on Bike Deal

Been checking out all of my LBS's in my neighborhood here in houston and came across a New 2007 Scott S50 in one of them and they are wanting to make me a deal on it......

this is my first road bike and i have done one Sprint Tri.....on a mountain bike .....and and going to keep doing Sprints until i am ready to start doing Oly's......

the bike has a sugg. retail of $679 and they are wanting to sell it for $500.....this is what my initial budget was set at and i feel that i will have a better product buying new than just trying to come across a used $500 bike that i know nothing about or where it's been(i have been searching for about a month).....since i am a newbie i feel that i should go new and get a bike that fits. the guys at the shop are very helpful and it is a 5 min bike ride from my house to just drop in if i ever need anything.....

i really like the shop and the way i was treated...i didnt feel like i'm being sold a bike, i felt i was being educated because they love what they do and they want to share their knowledge.....

$500 was their first offer.....should i try and get them to go lower, or just be happy with finding a new road bike in my budget....i feel if it try to negotiate too hard they will get the little i try to them down out of me sooner or later by doing routine work on the bike....

anybody have experience with this particular model?

Thoughts?

here is a link to the bike and specs.

http://www.bikepedia.com/Quickbike/BikeSpecs.aspx?Year=2007&Brand=Scott&Model=Speedster+S50&Type=bike

thanks in advance for your help!!

Jb