You really only need the 2.0 if the motor is over 600 hp, otherwise everything is overkill and a waste of money.

My vote goes to the FAST system. The others all seem to have issues that can take days or weeks to resolve whereas from what I've read, FAST really have their act together.

If you buy from Rich Nedbal his support is exceptional.

My second choice would be the MSD unit.

When it comes right down to it, the mechanics of these things is the minor issue, its all about the "code" and how good the guy was that wrote it.