303abuser CPU doesn’t get hammered too much. I’m on an iMac 2015 with just an i5 chip and it never gets above 30% with a few synths pumping away. As usual, as you increase the voices it tends to go up a bit.
If you are looking for something that is easy to modulate, then this is what you want. Why not just get the demo first and take the plunge if you like it?
The other Arturia synths look really good too. They’re trying to tempt me with offers for the Collection 7. I really like what they do emulating classic sounds. But not sure I need another massive list of synths to start learning. Still trying to learn Pigments!