Take a look on the Dell website:
The Dell Precision Workstation are good for Solidworks, keep in mind that you select an Quadro card.
I would say you first need to figure out how much you will use sw, and how large your assemblies will be. I used to run sw on a 500 gateway for home use. This wasnt my daily computer at work, just to "putz" on at home. I never had any issues. unfortunately you will not really find anything under 1k thats a workstation unless you get a re-furb.
You'll get the best value for money on a re-furb. Dell and HP make SolidWorks compliant machines.
I have a Dell Precision M4500 Laptop from the Dell Outlet for 2 years that replaced an earlier Dell Precision Laptop. I got both on the Dell Outlet and was very pleased with price and support.
Check out the threads in the "More Like This" box to the right.
Look at the threads in the Administration forum, where the best posts about computer hardware live. Post this question there.
Lots of students seem to be able to get by with laptops that don't use the professional graphics chips that SolidWorks wants us to use. But people also have lots of trouble with the wrong graphics solution on their laptop. Your $1K limit is probably putting you in danger of being one of the latter.
Suggest do what I did. Look on Craigslist for a notebook that has an Nvidia Quadro chip. I found an year old HP Mobile Workstation for $300. Took me about a month of checking everyday, several times a day.
San Diego, CA