As my signature implies, I am a casual listener, but only because I refuse to consider myself an enthusiast due my limited experience in HEARING what better equipment can offer. I have been subjected to all the receiver-driven sound one can imagine, and have always been intrigued with what seperates could provide. Whenever my intrigue resurfaces every 3 months or so, I have to force it back down by reminding myself that any additional expenses than what I've already incurred could further prolong my college experience and leave an even larger hole in my wallet. Since that part of my life is starting to give way to better times, it's my intention to start following my ever-present intrigue that is audiophilism. Although any real change is at least a year off, I want to start researching now, so that when/if I do make a change, its not a spontaneous purchase that I regret right after the return policy runs up. Please keep in mind, I have a lot to learn.

Currently, I own nothing terribly special or exciting, but not exactly shoddy at all. A system that impresses most that listen, but often leaves me feeling that there is something missing:

Pioneer VSX-D710S receiver
Pioneer DV-C503 changer
Front: Klipsch RF-5 black
Center: Klipsch RC-3 black
Rear: Klipsch RB -5II black
Sub: currently looking
monster cable throughout
xbox

I went with Klipsch because i fell in love with their sound back in the day. I listen to a lot of rock, alternative, classics, etc, perfect for Klipsch sound/performance. I can't really say that anything sounds 'bad' on these guys, I love em. Before that, had a set of JBL floorstanding speakers that gave me everything I could ask for at the time, except for that 'blow-me-away' rush that I get everytime I get passed 12 oclock now. To be honest, I've never heard what seperates can do, I've never heard Klipsch or comparable speakers on seperates, nor do I even know if seperates are necessary for my situation. (my reason for posting this thread)

I already know that Klipsch have a reputation for being easily driven, that a receiver can get the most out of them. But again, I'm still not satisfied. None of my friends share my interest in sound, which is exactly why I'm consulting this board for some advice. For opinions that I'd never otherwise hear.

To get to the point, I'd like as many opinions as possible. What should I be using to drive my system? Is what I have satisfactory? If I were to upgrade to seperates, would I get better sound/clarity/feel, or would I need to upgrade speakers as well to hear a difference?

Brands I've looked at so far:
Marantz, Odyssey(Klaus), some Yamaha, even Pioneer Elite

To those that respond, it is much appreciated, even if its only to tell me not to waste my time. Maybe that's exactly what I need to hear. Sorry if my questions are basic stuff, but I've got to start somewhere.