I have a bit extra cash and being hooked up with friend work at music store so I am looking to upgrade my audio set up of my PC. I am currently running a Titanium HD card to a pair of BX5a. I was originally thinking about just adding a sub polk PSW 111 but since I am getting great discount on speaker/amp as well so I want to add on passive speaker and an amp. If i were to switch to pair of passive speaker such as Polk Audio RTi A3 and NR-1504 Marantz amp along with PSW 111 sub, Would I notice a huge improvement over Bx5a and the sub?
I see a lot of people mention about USB DAC, what exactly is that and is that something I should look into for sound improvement?