I use an Electromotive TEC II . The biggest reason for this though, I got it pretty much when they first came out and there weren't that many other choices. It has proven to be a great unit though. Very durable and problem free. I still need to send it in for a prom update, so I can use the new win software. I still run the old PafZ Blend. If I was to buy another one today, I'd probably go with the MS or something else. Just because of the price, but the unit has worked pretty much flawlessly so it's proven it's worth. Do a lot of reading as there are a multitude of units out there today. There are some really good comparisons and writeups on here.