Most Efficient Miner?

[InterArmaEnimSil]

Has anyone done a comparison of recent revisions of the various miners on the same hardware?  Implementation efficiency is a big deal when it comes to squeezing execution iterations out of a program, and I can't help but suspect that I could squeeze a few more hashes out of my machine by using the most skillfully-written miner...

[TheSeven]

Which hardware are you talking about?
For GPUs it's likely to be the hashkill plugin, even though that's still in an early development stage.

[InterArmaEnimSil]

I was referring to GPUs, as that appears to be the majority technology for hashing at the moment.  The FPGA idea is fantastic, but I don't have the capital to purchase one at the moment.