limit bandwidth usage to all users except 8 machines

What is the best way or appliance to limit bandwidth usage for most all of the clients (30) but allow 8 or 10 machines unfettered access to all of the available bandwidth.  In the network that I am managing, several of the clients will start downloading/uploading and cause some of the mission-critical machines to slow down their tasks on the internet.  I am running a SonicWall TZ-180 but would upgrade this firewall to find an easy to implement solution.  The only requirement would be an appliance would need to do a good job of content filtering.  Thank you for any help.
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Cas KristCommented:
Maybe you can use bandwidth management of your sonicwall (advanced properties of your WAN interface). When you enable it you get an extra option in your firewall rules (BWM). Limit the outbound traffic for your standard outbound traffic. Create a second outbound rule which goes for your machines which need full bandwidth and set the bandwidth accordingly. (this is easiest done when the ip addresses of these machines are grouped togeteher).

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Also have a look at Fortigate (we have never looked back).
257RobertsAuthor Commented:
Okay, caskrist, I will try that.  I did not know the Sonic OS (enhanced) had that capability.
Cas KristCommented:
Yep, it has. Good luck and thanks for the points.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.