Curious, why does he need the front 3 to match?There really is no answer to your question. However, that speaker is VERY sensitive, so a couple points...
1. You won't need a ton of power, some most any AV Rec will give you enough power to man the fronts.
2. You may want to get additional speakers that have at least low 90s sensitivity, or it may be very hard for your AVR to EQ and give all the speakers enough volume. JBL530s?
3. You will want to have three indentical across the front...unless I am missing a matching horizontal center.
4. You will want a powerful sub that puts out some output to keep up with these speakers. SVS, Rythmics, PSA, Reastion Audio or HSU, but nothing 10 inch or low end.
One article to help answer that question. Matching fronts help present a seamless soundstage which is important for HT and multi-channel audio. Many feel strongly about matching all of your surrounds - but depending on the room, speakers you have up front, that isn't always possible.Curious, why does he need the front 3 to match?
Also look at the JBL LSR6332I am setting up a home cinema. what is the best combination of speakers, subs, and amps to go with the JBL 3732.