Which Dell desktop and Notebook specifications is good for Vista?

I am looking to upgrade 2 Dell desktops and a notebook computer on my network. They are Optiplex, Dimension Inspiron computers with either 512mb or 1gb memory. Which computer specifications will you recommend for the Dell desktops and the notebook?
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.

Depending on the software you would like to run, vista should get at least 1, better 2 GB Ram minimum, 512 is not enough, not recommended.
And please think about presentations: if you plan to use aero, you need a decent video adapter as well, directx 9 capable.
CPU is not that important, so any Pentium-M with at least 1,5 GHz is fairly enough.

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
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
Laptops Notebooks

From novice to tech pro — start learning today.