This package deal from B&H is a little more than what you've budgeted, but it's a really good deal for what you get:
Bogen / Manfrotto | 190XDB Tripod Legs (Black) | 190XDB-F,484RC2
You might want to keep an eye on the Marketplace here, as people ocassionally list tripods and heads for sale, either because they want to upgrade or because they've accumulated too many.
Ebay is also another good place to pick up used tripods and heads; oftentimes, you can get both the head and legs in the same auction.
If you want to go the used route, a couple of good sets of legs to look out for are the Bogen/Manfrotto models 3001 and 3021.
As for ballheads, I have the Bogen/Manfrotto 486RC2, which I like really well--brand new, it runs about $70USD. Another one that I haven't used, but is also well-regarded is the 484RC2 and it runs around $60USD new.
I got lucky with my B/M 3001 tripod legs and managed to find a good used set locally on Craigslist for $30.
HTH,
Heather