in my opinion, fl studio is the best way i have found to flip a sample and get exactly as accurate as you want with everything, and I always use the FL slicer, it is so easy, and always amazes me how i can just on the fly adjust the timestretch and the pitch with such simplicity, and just chop it into beats with a click of the mouse, then half beats, adjust velocity, easily add tempo synched delay, easy panning options, automation, there is just too much shit that you can do so easily when you are samplign with FL studio. and i hate to sound like a broken record, cus people always defend FL with this but "9th uses it" (haha i said it, you knew it was coming!) and he is dope with the samples.