Which Technician Units

I am just about to finish intermediate (if I pass ecr fingers x'd) and was wondering which units to take for technician. Has anyone got any ideas which units they are doing and why? Ive checked with CIMA and ACCA etc but dont seem to be able to find any concrete reasons for taking which units.
Comments
If you are going to be in practice it appears most of the students take the tax units.
I considered not working in practice as a reason to avoid the audit unit even though, as someone working in the accounts dept of a medium-sized company, I had been on the receiving end of audits.
I would recommend both tax units to pretty much anyone, but can't present a concrete reason why.
Ive also been told something about some people ending up having to take both tax units after they complete AAT because you need them for some Chartered courses?
By doing the three, from what I understood, I'll get more excemptions when I do the ACA after finishing AAT.
Angharad