asr-x pro nets you twice the max RAM capacity, a better (and stock) SCSI interface and synthesis capabilities. Sequencer is still meh, pads still like to break. I love you Ensoniq, I just wish your QA was better over the years <3
I'm not sure that I would buy another, but they seem to be going for between 300-500$ Mine's being used as an expander for my EPS and will probably end up getting supplanted and then replaced by an ASR-10 rack when I find one cheap enough. I keep thinking that I should just rip out the guts and rack mount it but I'm really lazy.