HEI or CDI?

I've got a mild slant that's being tore down for... reasons... Anyways, now's the time for upgrades, and ignition is towards the top of the list. The only problem is, I can't make up my mind between HEI conversion, or an aftermarket CDI type ignition (as in, MSD, but MSD itself is ranked pretty low for me)

Here's the options:

HEI conversion see here
This is the cheapest (~$100) and the least frills. No multi-spark, no limiter, so on and so forth.

CDI options:
Professional Products Powerfire VI This is the one I'm really wanting opinions on. Comparing specs between it and the MSD 6AL-2 this would be the one that I would pick, hands down. I mean, same features and almost the same spec-wise, but for $60 less. That's on paper, however. I've yet to see/here of anyone using this product. Does anyone? Would it be worth the risk?

There are other options too...
Mallory HyFire VI-AL
Crane HI-6 CD
*GASP* Speedmaster/ProComp? I mean, it's only $130, and it's got a 2-step... :evil3:

So... Inputs, advice, opinions or suggestions? C'mon guys, I'm awful at making decisions :banghead: