I think I'm on information overload. I've read far too much on both of these so I need some mafia help. I'm considering Dinan software (or AA for that matter but 20% off Dinan counts) vs. Shark Injector - and cost is a factor. Not looking for blow-out performance, just a little more oomph and butt-dyno feel. Which do you recommend, considering cost of installation, ease of maintaining (which I gather is minimum), etc? John