Here's a recommended list of IPA's in case your looking for some other brands.
The Alchemist: Heady Topper (east coast only)
Russian River: Pliny the Elder (Double IPA, or DIPA as it's sometimes referred too)
Russian River: Pliny the Younger (triple IPA, or TIPA, must visit Russian River brewing to get though. I dont' think they sell it in bottles)
Laugunitas: Hop Stoopid (Another DIPA)
Kern River Brewing: Citra IPA (Double IPA, really great)
Firestone Walker Brewing: Easy Jack (Great session IPA with a low ABV you can tip back)
Ballast Point Brewing: Sculpin IPA
Founders Brewing: Centennial IPA
Ninkaski Brewing: Tricerahops (better from a tap, but good all around)
Those are a few that I've tried. I'm not a dedicated fan of IPA's but I've had quite a few. These were my favorites. Going to look around for that Alaskan Brewing. I've seen them around but I've got so many other beers in the fridge it's hard to buy something else until I make room.