Anything other than stock air box will render marginally more performance in exchange for marginally more intake noise,
Sorry Ron but thats just not so, most pods have no velocity stacks and the Honda induction system was designed to specifically run with the stacks, pods generally pass turbulent air into the ports messing up the induction, i won't go further into it but the airbox, while it is really too small to supply "still" air, stops the turbulence which is an undesirable factor in the Honda induction design, Velocity stacks and good quality pods with inbuilt stacks like some K&N's may give a small improvement in top end performance as thats what the good pods were designed for but on the street the mod Brandon has already done will let the 750 breathe better and thats what counts...
Pods are also effected by cross winds and rain as mentioned....
Brandon, I'm going to use an airbox on my 1000cc fuel injected engine and air boxes on the 970 and 900 kitted engines... Pods are a compromise not needed on the street, they have become a bit of a fashion statement in recent times, form over function...
I should also say that this all relates to the stock type carbs, different carbs have different needs...
All modern road race bikes run stacks and airboxes....