Another con to the ES-1: no timestretch. I think the ESX does this.

I had an ES-1 MkII for about 15 minutes. It’s a fun little piece, but it has some obvious limitations, and I sold it almost immediately to fund an Octratrack. If I found one for a nice price again, I’d consider it because it is a pretty immediate source for fun, and I never got to try this tip to maximize the sample capacity: http://www.korgforums.com/forum/phpBB2/viewtopic.php?t=39660&view=previous&sid=3a30c9d13b91828809997799e7ac7a62