Hi Sid v. I would consider stretching your budget some for a better sub. I myself have gone thru a few subs ( Polk, Klipsch, BIC ), eventually settling on a SVS. I wish I had gotten the SVS sooner, but you live and learn. While the ones you mention are less expensive, but take it from me, you'll be left with wanting more. For subs, go ID (Hsu,SVS,etc.).
As for a center channel, to stay somewhere close to your budget, I'd look at the AJ Pioneer SP-C22. I know it's considered "ultra" budget, but IMO it's SQ is up there with speakers costing more...and it can take the wattage
![Wink ;) ;)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
. Also, it has matching fronts ( FS52 or BS22 ). I believe there was a review done on the whole line here ( Pioneer SP-PK52FS ). Might want to check that out. Hope this helps a little.