Ron,
Lagunitas brews two IPAs, their standard and IPA Maximus. The Maximus is truly superior, try it if you haven't already.
Those who like Stone's Arrogant Bastard are truly missing out if they do not also try the seasonal Double Bastard, Arrogant Bastard taken to extremes. A true test of character is to note that Double Bastard improves with age if properly stored and has the year of release printed on its label for those with the strength to lay some down for a few years.