@donniam: I believe BWPM works in conjunction with WP Super Cache. I have read through all of the posts in the forum and find several comments of users that have both working fine. Granted, you may need to do some tweaking depending upon which theme and plugins you are using, but that is the cost of using plugins in the first place.
To clarify:
– Caching only improves performance for return users as well as users that visit subpages with similar content; the first time they visit the site the files are downloaded and cached. The cached files do not need to be downloaded again upon subsequent visits [until they expire or are deleted from the cache.]
– Minifying improves performance of every page load; including the initial visit; subsequent visits are further improved due to the reduced filesizes.
Hope this helps you make your decision. I am about to implement both once I finish going through all the set-up and docs; I’ll post a separate topic if I have any issues.