Graphics card question

I will be purchasing a new computer within the next month and my question is for those of you who do graphics every day what graphics card are you using and why.

I would also be interested in what type of processor you are using and the speed.

I have a few thousand images that I have created so getting the right system is something I really want to put a great deal of thought into before I make a purchase.

I always dread doing this because I have to download new servers for my printers.

I am talking to a few different service tech guys now about getting their help when it time to make the change.

Last time a service tech told me that I should reformat my system it turned into a compete nightmare!

I will be purchasing another PC with a windows operating system.

The one I have been using for the past five years is just really outdated.

Just wondering what others professionals are using and why.

               Thanks for any advice you might be able to offer.   Jimmy