its not an alternative to a PC. the two of them have different effects in terms of your bike. DP is somewhere around $1200 factory, $600thru motowheels reflash tool (though it seems like once you buy it, you can only load 1 map onto that one particular ecu)
or around $500 thru monstermash, and he will even do it a second time with an updated map based a dyno sheet you provide him free. However i havent heard much of him doing this, so youll have to contact him directly.
that's only for the old style monsters though, the new monsters use Siemens ECUs and i'm pretty certain they can't be reflashed by this process
yetAlso to clarify. the DP ECU comes with the Termi kits along with K&N filter. so for 1200 factory you are getting ALOT.
the PC adds on to your stock computer and modifies signals before and after the ECU. the DP ECU replaces your stock. there are other replacement ECUs but cost is much higher.