Here's a discussion about the various Lisp options: http://programming.reddit.com/info/1edrw/comments http://programming.reddit.com/info/1edrw/comments We use

Here's a discussion about the various Lisp options: http://programming.reddit.com/info/1edrw/comments http://programming.reddit.com/info/1edrw/comments We use Lispworks, but if there is a better (especially freer) option, we would switch in a heartbeat. (We don't use Allegro Cache - so that wouldn't hold us back from switching). So far our systems are running very fast with LW - no complaints on speed.