You whant to 1)Play 2)CAD 3)Edit video
1) The best U$100 = Is any one with the Geforce 2MX (NV11) chipset as: ( in order of good to poor)
Guillemot/hercules Prophet IIMX 32SDRAM
Asus V7100 32SDRAM
A-open PA256 32SDRAM
Elsa Geforce 2 NV11
Cardexpert Geforce2 32SDRAM
G450 Matrox 16DDR (16DDR!!!= almost to 32SDRAM!!!)
G400 32 SDRAM
Consider a Radeon LE, which has 32megs of DDR ram at 128bit. The Radeon has excellent 2d (clarity and speed) next to a Matrox. Can be had for less than $90 shipped to your house.
I think he should loko at the Radeon VE.
It is a 32MB DDR Video card with TRUE Dual-Head 2 Monitor capability. It is fairly fast in todays games, VERY good for CAD/CAM and video editing, with it's dual monitor setup.
You can get it retail for around $100 now..