Engine reviews...?
 

I want some information on a FEW engines that seem to be in the top class right now(among a few others). I don't want to know which is best...since for each one of us this question might have a hundred answers.
I need info on there:

1. powerband (low,mid,high)
2. runtime
3. quality (reliability)

A review from those who owned one or more of these engines would be much appreciated.

Engines:
1. O.S. V-spec Speed
2. RB C6BB
3. Sirio EVO 3 STI
4. Picco EVO 2