If it sounds awesome and you're presently pleased, why not revel in that and enjoy it as much as possible for as long as possible? Basking in musical pleasure and contentment is far better than suffering from the upgrade bug. Wait until you really feel what you have isn't delivering what you believe your system is capable of offering before you start to scratch the itch to get new electronics.

Buy and listen to lots of music!!! Have your friends listen with you! Enjoy your system now...they'll be plenty of time to upgrade, if you really need to.