+1 on the Shimano 105, Ultegra or dura ace.

I think that anyone can find the right bike for them at any decently equipped bike store. I agree with checking out the reviews on the bikes. But also check out your local bike shops. Ask around and see what their reputation is like for service. If you have one bike shop with outstanding service, go to them first and then just try all the possible bikes they have. If that doesn't work, move on to the next store.

You can always buy a bike anywhere and get it serviced at any shop you want. But it's nice to buy where you'll be getting your servicing done.

PS - I bought my first tri bike used and out grew it in a year. I went whole hog and bought the best bike I could for me and I'm still riding it. It's 7 years old now. It's totally worth it to pay the money for the right bike when you find it.