For under 1K are you thinking 5 sat's and a sub?
Besides the SVS suggestion from Gonk, for a quality set of speakers you may want to look into the "X" Series speakers from
www.av123.com For roughly $700-$800 you can have a complete 5.1 setup. The sat's, which are fairly large and finished beautifully, do not include grills. If you have kids or are against having your woofers and tweeters exposed, these may not be for you.
Another option may be Ascend Acoustics HTM-200 speakers and a Hsu(or similar) sub.
Lotsa options out there.