Newbee, Bigtee and Nsgarch have given you good advice. IMO, the bottom line with cables is determining at what price point (for you and your system) you are better off spending the money on component or speaker upgrades vs. cables. You may also consider, DIY offers a relatively inexpensive avenue to compare different (but not necessarily better) cables, and also to learn a little about cable construction and the goals of cable design.
cable upgrades , real or rip off
im sure this has been done to death on other threads, but im somewhat new to the high end audio thing. but i must ask do these items make a huge diff. , a small one or something in between. i cant help but asking myself why when a company is trying to produce a knockout item such as a intgrated amp that costs say 3000.00 would they skimp on something like a 300.00 powercord if it would make there product sound that much better?