Fished out of a cat, now fish a 130R. The R has more floor space than a D but either of those in my opinion is a much better option than a puma series because I feel like my knees are on my chin because they are so diminished. Many people like the really aggressive diminished design for agility (which they do well) but I just never really found the need for the extra maneuverability in Colorado, even on more "technical" fishing floats. For me its fishing, so I like to be comfortable, I don't paddle raft and want a nice stable platform so that is why I chose an R series. Other boats are great but if you're set on an aire then my vote is for an R and if you think you need it, a D.
As others have said it, depends where you fish. Cats are nice but most setups make it so you drop things and lose them, and if you get over 13' the pontoons become wind sails in my opinion. Other than that cats are awesome and really keep you above the water, I just usually prefer a raft now. Both have +'s and -'s. If you have space, just make sure you budget for a trailer, you will be very thankful.