Just get Dan Kyle's map... Really, just get it and be amazed.
A custom map is only as good as the guy that makes the map. I had a custom map done for my Triumph Daytona 675 and it SUCKED!!!! Cost me $700.00.. eventually I had a guy in Australia share his with me and it was great.
I had a custom map done for my 2006 ZX-10R and it turned out OK, but nowhere near as good as this map I have from Dan.
As far as I know, Dan has close to 100 hours into his map and it's made my Bike, by FAR the best, most smooth, most driveable Bike I have ever had. That's apart from the ballistic power that his map will give you.
Dan will let you have his map for free.. what have you got to lose? If you don't like it, go ahead and get a custom tune.