Best GPU Option for ML for less than 100 bucks?

[ne0shell]

My old 8600GT is failing (my GT210 burned out and another card I bought doesn't work at all). What Nvidia cards are the best option for ML and hopefully further updates for less than 100 bucks right now?

 

[Macblack4]

Nvidia GTX 650 1 GB is right around $100 after rebate. I have an MSI card working fine - there are plenty reports of other brands working also.