I too would say it's technique as far as breaking sticks as often as you say you are. Do you tend to crack cymbals too? If so, you are playing either too hard or need to improve your technique.
As far as beefier sticks, I use (and swear by) Ahead sticks. I used to use the joey jordison model because I liked the length/diameter the best -- the "rock" ones and tommy lee/lars ulrich ones are too fat and heavy for me. I now use Ahead "SwitchStix," which are basically the same as the JJ ones but have a mallet on the butt end. These are awesome for effects like cymbal rolls/crescendos, etc. I swear by them, and have quit buying wood sticks altogether.
The sticks are perfectly weighted and balanced, are always true, and have replaceable body sheaths so you can just switch them out if they get too chewed up and it's like a brand new stick. You can also change/replace the tips for different shapes or effects like mallet tips. (You can get a double-ended mallet by using the SwitchStix and a swapped out mallet tip as well)
The sticks are amazing, I'd highly recommend you give them a try at a local drum store. A lot of places don't carry them, but will if you ask them. I have bought them in-store and online, and you'll always end up paying around $35-38 a pair, so *they are* a tad pricey, but WELL WORTH IT imho...
Switchstix are 5A sized (to be precise, .540 Diameter, Medium Tapper, and are 16.35" long), are a little bit heavier than wood sticks, but always MUCH more uniform.
ANOTHER GEAR CHOICE would be a groove wedge for when you are doing rim clicks. They attach to the lugs and give a great loud click. It's 19plys of maple that you place in your ideal space. Won't chew up sticks like the die-cast hoops and gives a huge (and easy to get) rim click sound.
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AHEAD SWITCHSTIX:
http://www.interstatemusic.com/webapp/wcs/stores/servlet/product_900467970
GROOVE WEDGE:
http://www.russmiller.com/productswedge.htm
Good luck!
-Smallstothemax