LinuxCAD won't compare to AutoCAD, most likely. I have successfully run AutoCAD 2000i under XP with VMware workstation in RH 7.2. It ran fine, no problems with 3D or anything.
Get VMware
here and try it out. Its a 30 day trial, after which is stops functioning. If you are serious about running windows apps on a Linux-only box, this software is well worth the money.
[ December 23, 2002: Message edited by: Heywood ]