I have a desktop that I built about 6 years ago now, when the first Intel Core i5 chips appeared on the market. It's an i5 750, 4 core chip that tops out at 3.2Ghz with the speed step technology. It has been an awesome chip and I believe it's one of the best CPU's that Intel has ever made. Having said that, it's almost time for an upgrade and I've been looking into what is going to be my next upgrade.
Having said that, I have had three video cards through the machine since I built it. The first was an
NVidia 7950GT. A brute of a card that gave me lots of video grunt, but absolutely useless as a card for sound recording, as it sounded as if a 747 was flying overhead during the quieter moments of any guitar/vocal songs. It was a card that I had leftover from a previous build and was quickly replaced with an older
Radeon X300. I was happier with this card as there was no cooling fan and it could do anything required of a computer that involved sound and most graphics. It wouldn't play any games newer than 2002 but it would run Photoshop, and supported two monitors.
In 2011 I purchased an
NVidia GeForce G210 made by Sparkle. Although you can't play any of the later games with it, it will do almost any graphics task with relative ease and supports 2 monitors. It is passively cooled and in my system, runs a 24" Dell monitor on DVI and a 22" Dell on VGA.
Having said all that, with my next upgrade, which I'll be building hopefully early 2014, I'm going to try the built-in graphics on either the Ivy Bridge chip or the new Haswell. I have always gone the stand-alone graphics card rather than the CPU/GPU combos, but I'll give it a try. I'm not holding my breath as I've always firmly believed in taking as much graphics load off the CPU and putting it on a card that's designed for the job.
I've found that almost any stand-alone video card will do the job for an audio setup, but I think buying a known brand, that is well made, will cause you less grief in regards to compatibility and longevity.
Hope this gives you ideas for your system. /cheers