It is an area well everyone has an opinion regardless of the science and engineering involved. I'm not saying you can't spend your money on cables etc that cost big bucks and look very nice. But, I would do that dead last after everything else it at the level you want it to be. If you have enough money, who cares what kind of cables and wires you buy? It's your money to spend as you wish. For those that don't really have a lot of money and need to sort their system out to a higher level, the speakers are #1, then the room is #2 and after those two are good enough THEN go after the other more expensive stuff like high end amps/preamps, mega buck cables and wires, exotic DSP systems and on and on. I say if you have the money, spend it!
agreed, anyone not understanding the pecking order of what you said is someone you do not want to take advice from !