Upgrade JBL 7.1 Setup to Energy RC-70 Setup?

So basically I have the following setup in my basement right now.

Its a about a 20x12' room with my TV one of the 12' walls with my speakers on either side. The floor is Tile on a slab with a big area rug over it. Its a nice Rectangular area'.

I don't listen to a lot of music and use this more for Movies and Gaming.

Currently have a setup I built back in 2002

Fronts- JBL S-310
Center - JBL S-Center
Surround - JBL N26's
7.1 Surrounds - JBL 24's
Sub - Sony SW40
Receiver - Onkyo RC360
TV - Mitsubishi 65" DLP

I have been toying with upgrading the sounds system in my Home/Theater - Game Room and moving the current to my Living room.

I guess the real question is will I hear significant differences with the following over what i currently have.

Looked at

Fronts - Energy RC-70
Center - Energy LCR
Surrounds - RC - 10
(potential RC-10's for 7.1 if I decide to go that way)

Right there I would be looking at around $1100 to overhall just the speakers. The sub can be the last to upgrade as I am in a townhouse and keep my base moderately mid level anyway.

So few questions....

1. Would that upgrade be worth it and how significant of a difference will I hear?
2. Would my receiver be powerful enough to handle these speakers?
3. Would there be cheaper options that would still be a huge upgrade but cheaper than the energy route. i have seen Polks, Energy V6.2, etc.
4. Is my space to small for Badboys like Energy, etc.

Thanks in advance. Just trying to flesh out my thoughts here.
Edited by ffactoryxx - 9/24/12 at 8:19am

Haven't thought about making the move from them yet. Can't you find them?

Thanks.

Anyone think it wil be an earth shattering difference such as moving from a cheap Home Theater in a Box to a Energy system.