Nelson's tune ( mail order ) is by far the best i ever used, and yes i have used a few, one thing about allen, if theres a problem with the tune and you feel its not right call him or send him a pm or even mel which now handles all the calls. theyre very prompt now and they'll get ya taken care of quick, you just have to ask questions if you feel theres a problem with your tune. go to the source and resolve it 
one thing i never understood, its it true you have to give a tune time to settle in, i never did and never had any issues i put it in and run the dog out of my setup lol.. i dont have time to put 100-300 miles on a tune!!!
Simple: 408 on steroids!
single digits coming soon!