There are so many these days - 20 Fathoms, Speacialfins, Waterways, DiveR, Gary Fisher, Omer, Imersion, Picasso, and on and on.
If I could have done it all over again, I would have just bought a pair of Omer Pegassos from Jim at
The Spearfishing Store. One good thing about the new Omer blades is that they don't use screw holes, so they are less likely to break there.
Since you already have footpockets, you can just get some new blades.
20Fathoms has the Edge and lots of folks really like them. The owner, Dennis, has just put up a video on the website that demos thier durability - pretty cool. Also check the member items section on the forums.
There are other people that could tell you more than me, so keep asking around. Good deals seem to pop up fairly often too.
