I made a nice American IPA a few weeks ago. I used Warrior and Magnum for bittering, and a mix of Falconers Flight, Centennial, and Cascade for flavor and aroma. I dry hopped in the keg with cascade. I used 70% MO, 25% Vienna, and 5% crystal 60. O.G. was 1.060 but it finished at 1.008 so it is 6.5 Alc. The yeast was 1056. American IPA is not my favorite style because so many of them have a milk weed flavor and aroma that I find objectionable. This one came out citrusy and refreshing with plenty of hop character.
English IPAs are my favorite. Think English ingredients, but hop to the level that an American would use. I would use 90% MO, 10% English Crystal 60, and I often throw in an ounce or two of dark malt for color. I have used dark crystal, and it covers up some of the hop character so I like the lighter crystal better. For hops, I like 50-60 IBU of Fuggles or Challenger. Add East Kent Goldings for flavor and aroma at twice the rate as you would for a pale ale. Dry hop with EKG. I like Wyeast 1968, but often experiment with other yeasts. OG should be 1.062-65. This will be more complex than your average American IPA. I hope to have time to brew one of these before new year.