Newby to the HT world;

My Sony receiver is 6,1 x 100w 4-8 ohms, and offer mutiple settings.
I'm looking into upgrading my Sony speakers to Axiom speakers.
My room is 30ft x 20ft x 8ft, with bar section and pool table.
My screen is a Sony LCD 60XBR950.
The wizard suggests M60's front, Vp150 center, QS8's surround, and EP500 sub.
My question is should I first consider replacing my receiver, or will it be up to the task with the Axiom speakers ??? Will I hear a true difference in sound with this receiver ???