With the time I have put into swimbaits, I definitely prefer two rod types for different swimbaits. For any single hook swimbaits and larger (4oz+) hard body swimbaits I prefer a fast action rod. For treble hook applications such as the s-waver, bbz-1, ganscraft glide baits, I prefer a moderate to moderate fast action rod. This allows more freedom for the lure on the retrieve and also keeps the fish pinned with the treble hooks.
Then of course, you may need several rods to throw differences in weight. Great recommendations on this thread, but also check out the Megabass Orochi xx Leviathan rod which is rated for lures 1/2oz-8oz, mod-fast action. Also dont leave out the daiwa zillion swimbait rods out of your decisions.