Could do with some advice please on suitable hardware for a win 7 pro box that is to work in a live broadcast sound studio with a 5760 x 1080 desktop spanning 3 DVI-D monitors. The box will never repeat never be used for gaming or even full screen HD DVD playback. Desktop will be displaying Adobe Audition CS6 (non cloud working) plus e.g. iTunes or similar and probably IE so cpu loading is not high. Box is part of a domain with all user accounts on a server.
Essential is quiet operation in live mic environment so am thinking of an Antec P100 case with a fanless psu and possibly an ssd. Probably an i5 dual core with 8gb ram.
Issue is with the graphics. Have had suggested a GTX 770 2gb card which seems way overspecified for the task, as it is optimised for gaming, and at £275 is not cheap.
What cheaper options are there please, and would using 3 x USB 3 to DVD-D external adapters (about £170) be an option?
Cost is a factor (charity) so do not want to waste money on performance or specification that will never be needed.
Any advice gratefully received, need to make decisions asap.