TexasRig,
Where do you plan on fishing the most? Lakes? Rivers? Coast?
The reason I ask this is that, even though I have not paddled the Amigo, it does not have much rocker. Meaning it's a kayak that is better suited for protected waters and rivers. More open waters like lakes and bays can get very choppy with wind where owning a kayak with more rocker that aides in slicing through that chop is more beneficial.
I'm not going to agree or disagree with what others have said (especially those with first hand experience), but to better answer your question we need to a little more about your fishing habits.
Totally agree with this. The Diablo isn't for everyone. I personally have been researching these a ton lately and have a demo setup this weekend. For my fishing style, I prefer to fly fish pretty much most of the time. Being able to stand and cast is a plus for me. Most fly fishers in the Austin area use this boat, for what its worth. I've tried and bought numerous kayaks and cannot stand in most of them, at least not comfortably. Sitting and flinging a fly around is ok but not ideal for me.
Another point that has me interested in the Diablo is that after sitting down for hours in my yak, my back starts to tighten up and get really sore. I want a yak that will allow me to stand up, stretch, move around and not be so immobile. I know from speaking with several Diablo yakkers that the skeg is a must.
The Diablo is not made for larger lakes. I mean you can but it does sit high. More suited for stillwater/rivers/small lakes...which works for me. I get exhausted covering these large lakes.