The Best Graphics card for a non gamer with an i7 4770K CPU and Gigabyte z87-d3hp MOBO

I'm looking to upgrade my computer (it's my toy/hobby).  And I'd like to address the Graphics Card.  I'm looking for a great card (that will show improvement and performance gains over my current Nividia GTX 570).  NOTE: I never, never play a video game.... I do a lot of research, business writing, and some surfing the web.  

MY CURRENT RIG:

I have a dual display with two Hanns G 32" montiors on HDMI

Windows 8
i7 470K OC to 4.4GHz
Gigabyte z87-D3HP
Nvidia GTX 570 Video Card
16GB RAM:  2 x 8GB sticks of Corsair Vengeance Pro DDR3 2133 Ram
Hydro H 50 liquid cooler

Three questions:  
1 - I'm looking for a better video experience (at a reasonable price).

2. I'm thinking about changing my MOBO to the ASUS Z97-PRO (Wi-Fi ac) LGA 1150 Intel Z97 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard... (but don't have a specific reason other than Gary Case told another person if he were building a system today he'd use that mobo -- actually the one before this one came out)

3. I feel I should upgrade the Hydro 50 to the Hydro 100 or Hydro 100 i.... (or another liquid cooler -- IF IT WILL MAKE A DIFFERENCE)...


Also, I just learned the I7 has an onboard video card - I'm assuming that is less than the Nividia GTX 570?  Or would removing the Nividia be worth while?  I just feel the GTX is "old."

Answers today would help, I plan on buying today and tomorrow.