Honda RC166 sounds pretty good too!
The RC174 is another one that comes to mind.
But for me, nothing compares to the old F1 V10's & V12's. Like bailgang mentioned.... kick up the revs again like the mid-late 90's and into the 2000's. Back when the commentators used to tell you to turn up the tv at the start of every race.
All this talk is getting me excited for the 2016 F1 season, and we're only 1 week removed from the 2015 season. Ugh! 118 days until Albert Park. I've always been a Ferrari guy, but will certainly be rooting for Haas F1 as well. I know they are in partnership with Ferrari for the power unit, but I also believe they are kind of like their B-team.