Welcome to the forum.
About any current card, with good driver support, should work fine. The amount of VRAM is not that important, but I would go with ~ 1GB. The driver support is the main factor.
I am running PrE 4.0 and PrPro CS 2 Production Studio on my laptop w/ an nVidia GeForce 8800M GTX - 512GB VRAM, with no issues. That card/chip is a bit old now, and obviously the VRAM is less, than I mentioned, but to "future-proof" the computer a bit, the ~ 1GB VRAM would possibly help.
Thank you Bill - this is a great help!
Many thanks for this.