If you want the precision of a Sachtler with its click detents (I do!) and need a fluid head payload limit up to 13.2 lbs, these two - especially the limited edition Freddie Wong version (I'm not a lime green kind of guy, but hey, other than that and the feet I don't see $300 bucks' difference) are the lowest priced units Sachtler makes. They don't have the touch & go QR plate that I like, but hey -- a person has to make compromises! I love Sachtlers.
If you can live with an 8.8 lb limit, the lowest price Sachtler out there is the Ace M, $621 last time I looked at B&H and Amazon (looks like the Freddie Wong got its feet from the M). That's light for my needs, but yours may vary.