Looking at the wrong end of the gun ...
Gopher ... the files sizes of the SONY images are so much larger than the Canon, it is rather scary ... but to get the "machine-gun" recycle of the frames-per-second, those images have to get the heck out of the buffer as fast as their little legs will carry them, hence the increase in bits-per-second transfer to the memory.
420x is perfectly doable - no bottle-necking - and works ... 133x does not. Keep that one in your 12-17 MP camera and be happy, I guess. When you get the Canon up to 24.6MP @ 5fps ... then we shall speak, once more, about this.
Speed is Killer! :D
Not buying into the brand ...
Yes, my 133x CF cards were Transcend ... but, Transcend now makes a 400x and a 600x card, although I do not use them. Yes, I have become a little leery. :eek: Burn me once ... and all that.
Still, they still work just fine in the α700 and that's where they will reside, happily collecting 12.2MP images from its slower buffer.
Going BIG ... or watching the walls at home
I was thinking of going with the 64GB Calumet ProSpec CF card and then the SONY 32GB Memory Stick, as a backup.
I know that 98GB of mass image storage seems a bit conservative to some folks, but it is how I roll. :p
C'mon, have a little excitement in your life:
"I shutter every time I see something I like." :eek:
You know something ... I going to put that on a photography club T-shirt.