what is getting plugged into the 'bar'?
checking out wires is the 'due diligence' of this past time. it gets very tedius but this area will pay off with effort and paitience. personnally I'd look into the used PC arena first. you'll get more value and performance for your money.
my reasons for asking what is the application revolves around the 'kinds' of PCs.some are aimed squarely at deadening the noise, others at elevating other aspects of the bandwidth. not all PCs are the same and with EXP you'll find this out pretty quickly.
if I liked AQ and already had some in my rig, I'd probably look towards them initially. possibly even exchanging one already in use to the duty of supply, from where it is already in use perhaps.
lastly as the main supply PC keep in mind too, it will add its sonics to everything downstream of it.