Are you on a dyno? How are you estimating your whp? What psi are your running to get 251whp? I would guess you would need 25ish psi at 6k. I am looking to get this car for a daily and want something responsive...and with the piggyback tune..it seems to make a big difference. It seems this is a much better deal than a Civic SI if you are not trying to mod the fuck out of it.It's a bargain for the amount of things it's capable of. They don't offer discounts, but the others aren't better products either.
That said if you want to run E85 or WMI, among other things you want the JB4 and it's worth the price compared to bench flashes.
You can get a bench flash for just under $500. I know Tork and LAP3 have more options such as E85, 2 step launch control and higher rev limits. Sxth offers a OE+ tune that basically fixes the rich condition, cleans up the timing curve a bit and increase boost maybe 1-2 psi at most which is the most you can get away with on pump gas and the stock intercooler.
It really depends how much power you want to make and it's not risky, we aren't running the engine hotter or turning it more RPM, all things that would shorten its lifespan.
My goal is 300whp and I'm already at 251 whp