I'm looking for a music production software on my Mac. I need the following; - RELATIVELY lightweight (I use a 2007 iMac. It runs alright, but lags sometimes.) - Ability to record electric guitar via USB or digitally - Powerful vocal editing. I like the flex pitch on Logic Pro X. Something more than simple AutoTune. - Relatively inexpensive. Preferably under $150-ish. LPX is out of the question, because it probably isn't lightweight enough. I use GarageBand currently. It's great, but I just need more powerful vocal editing. Also, I'm not looking to sound robotic.