I ordered:
4 x 532, PLUS STANDS
1 x 533VAC (wonderful center speaker)
1 X S-10
The S-10 was backordered for 6 weeks so they sent me the S-12 for the price of the S-10. What a beast that thing is! Beautifully large though. If you watch more movies than listen to music, the S-12 is the way to go. The low-level base in movies will blow you away. Either way, you will have a wonderful setup. I would go with all 532's though. Use hi-quality, metal banana clips, not the plastic crap available thru Radio Shack.
Hope this helps