If you purchase five pieces from Axiom, you get a discount. Mains, Center and surrounds = five speakers. Purchasing the sub won't get you a bigger discount.
What size is your room? If you only need a smallish sub, there are other options that may be a better "bang-for-your-buck" buy. You won't have the matching finish that you would if you stay all Axiom though. If on the other hand you need/want a real beastly subwoofer, the EP500 and EP600 subs are darn hard to beat for their price -
and you'll have matching finishes to boot!
