1. Abelton Live It took awhile for me to really start getting hooked on Abelton, that's aside from its top notch ability to Tempo Correct. Now I use it for most everything. My version is Abelton Live 9.
2. Fruity Loops For rhythm track creation I use it 99% of the time. I know I could create my rhythm tracks/enhancements within my Ableton as well, but in my process, FL does exactly what I need it to do. As far as which version, I am using FL Studio 11.