I don't know if it really fits your criteria, but I really liked the First Law trilogy by Joe Abercrombie.
The Blade Itself
Before They Are Hanged
Last Arguments of Kings
Page counts are all in the 600-700 range and definitely exciting and fast-paced. The only caveat is that the series are considered to be in the Grimdark genre of fantasy. Grim and Dark.
An interesting discussion of this series and the Grimdark fantasies from earlier this year over on MetaFilter:
http://www.metafilter.com/125480/The-Value-of-Grit