Any answer you get in this thread as to which is the "best" set up is going to be opinion based at the most. At the least it's going to turn into an all out pissing match.
I suggest you take some time to read a few past threads on the subject, check out some of the members rides and come to an educated decision on your own.
Things to consider
Budget
Ease of installation
Maintenance
Upgradability
Projected power goals
Projected vehicle goals
Where you want to make the bulk of your power