Well, my old Radeon 9550 card worked beautifully for what it was used for. I had absolutely no troubles with it besides a single blue-screen during driver installation on Win7. Though as a result of that, I'm always waiting for AMD drivers to blue-screen during the install process now. ... But then, I never tried playing DirectX 11 games on my Radeon 9550...
AMD cards have always been more cost-effective, in my opinion, as nVidia cards of the current generation command outrageous premiums in comparison. Remember that my new computer budget is never any more than $500 at the most.
To be fair to the HD 3650, I kind of was using what AMD considered beta drivers. But, in my defense, they were the only ones that actually worked with Windows 8.1. The GT 610, though, should have complete Windows 10 support when it comes out, where I was using beta drivers to get Windows 8.1 support with the HD 3650.
Given the right amount of money, I will go with an nVidia GPU over AMD any day, like how I would go with an Intel CPU over AMD CPU/APU any day.