I like the bigger units such as the MSD and the Mallory, less misfires due to carbon tracking. Also, you get choices on how fast your advance gets in with the different spring kits available.
I picked the MSD because of the compatibility and triggering for the digital box.
The Unilite is also an excellent choice.
I have never owned a Pertronix anything, but there are a lot of horror stories out there about those modules.
The 009 is a good unit if you can find a good German one, but some of the newer ones seem to have quality issues.
A good rebuilt 010 is a nice dizzy for the street/strip as well. There is a fellow on this board named Glenn who does a bang up job rebuilding Bosch dizzies, from what I hear.
Just my .02
Csaba