I've been using Sonar for my EDM cover band backing tracks for around a year now with really excellent results. I've been able to pretty accurately duplicate a lot of Calvin Harris patches using Z3TA+. A lot of people use Abletron for EDM, but I don't think there is much there that Sonar can't do better. We cover the current Billboard electronic dance charts and Sonar has worked great for everything we've done. Here is a cover of Gareth Emery's Concrete Angel all done in Sonar.
https://soundcloud.com/th.../concrete-angel-take-2I've done Calvin Harris, David Guetta, Ellie Goulding, Armin van Buren, Rihanna, Krewella, Medina, Avicii, Daft Punk, you name it all in Sonar. I'd be lost on any other DAW.
Z3TA+ is great and it's my go to synth for just about everything mainly because I've learned how to use it but you might also want to check out Sylenth if you're doing EDM. Avicii uses Sylenth for most of his tracks. You'll probably want to use both, Z3TA+ does some stuff that Sylenth doesn't and vice versa.
Since most of the stuff I do has a time constraint (get it done for the next rehearsal/show) I haven't spent a lot of time playing with loops or grooves and pretty much stick to making the sounds myself.