Check out the forums at yamahastarbolt.com/forum
There's been a ton of talk over there about this. Performance wise, Ivan who does reflashes of the ECU as well as some other people have noticed no performance gains from one aftermarket intake to another. It's really just deciding which looks better to you visually. They're all better than the stock airbox, and will all provide more air than your bolt could need. Definitely look into the reflash if you haven't yet. Thats really the only way to get the performance upgrades.
2007 V-Star 650 Custom - SOLD
2010 Vulcan 900 Custom - SOLD
2015 Yamaha Bolt