All saber blades tend to break. It comes down to your feel and preference. Keep in mind that their is no such thing as FIE saber blade no matter what the vendor says. I do not like most of the Chinese saber blade I have seen as they just feel “off” although being primarily an epeeist that only plays with saber I tend to be much more sensitive to the feel of weapons than most dedicated saber fencers I know they just don’t seem to get the “horrible balance for point work” comments I make about their weapons!).
I am a big fan of the StM saber blades. For me they have a good feel, come in a cool looking rust inhibiting coating and tend to last a good long time. I have had very bad luck with any of the Uhlmann/Allstar/BF saber blades I have tried. Most definitely not worth the money IMHO. If you are looking to spend a bit more money I have heard good things about the PBT sabers (love their rubber over metal grips) and the Leon Paul blades although I do not have any real experience with either of those. As to places to check out for good prices on saber blades try:
www.thefencingpost.com
and
www.shopeli.com
Best of luck!