While there is no set standard for real estate fees, MANY realtors will follow the exact same fee structure you just described. But none of that really matters. Your company doesn't matter. Your agent doesn't matter.
I see a lot of quality responses on here that are VERY good advice for picking an agent. But to tell you the truth, they really don't matter. I'm going to venture off the beaten path here and tell you something that no one else will.
In this economy, the NUMBER 1 thing that will sell a house is.....PRICE!
If your home is not properly priced, your agent (and company) becomes irrelevant, because you will not have the right targeted audience to view your home. And it WILL NOT sell.
We all talk a big game about how we fiercely negotiate for you, protect your interests, and help find buyers. Yeah, we do that. But the absolute most important part of our job is the part we do before you ever sign a contract, and that's the Comparative Market Analysis.
So, I would suggest a three question interview process for your potential agents.
What will my home sell for?
How are you going to make it happen?
If those answers satisfy you, there's your new agent!
Good luck, Rob. Hope I didn't come off too surly. But price sells, man.