Really depends on what you expect from your Ion,how much youve already modded,if you'll keep it
Blackheart&Virtue boards do offer more adjustments then stock,allow greater ROF,easier to program.If you play unlimited ROF,ramping etc these are both good options.
If you play at public fields or tourneys where ROF is limited it probably isnt worth it.
Have you added a QEV&aftermarket bolt?If not start there as board adjustments wont matter much
Usually the last add on I do is the board,I prefer Virtue because Im used to the programing& warranty is awesome.I play most games at private field where ROF& ramping are allowed and Im hard on my stuff.Im also a gunwh*re