JBL-Infinity-surround sound speakers  

I have a pair of JBL L-36 speakers that need to be refoamed at the least.Can it be done with a kit or must it be vendor repaired.Where, who, are they worth it,can I get replacement parts(speakers).I also am interested in going to surround sound.I have Infinity RS 4001 speakers,should I add to them? I was considering satelite speakers.I have under a thousand to spend.I was looking to go sub 125-200 watts.JBL,Infinity do they make decent sound. Talk to me I have been out of the know for too long.I have a great room(living,dinning,kitchen) all one room 15' ceilings.GOD Bless You