Ribeye is good for flavor and easy to get anywhere.
The best cut is short loin. The muscle doesn't do much so it is very tender and plenty of marbling.
The types of steak that come from the short loin are NY Strip, Porterhouse, and T-bone, right? While I cannot speak for the nuances of porterhouse, because I haven't experienced one in recent history, T-bone is nowhere near as tender as ribeye in my experience. T-bone also has some gristle too, which isn't something I ever experience in a ribeye or NY strip. Needless to say, I am none too impressed with T-bone.
Onto porterhouse... I really want to try a good porterhouse steak because it's the only cut of steak that I haven't gotten a proper sample of. However, and perhaps I am mistaken in this, I have always assumed that a porterhouse is just a larger version of a t-bone, is it not?
One day I will get some kobe wagyu steaks imported, and give those a try. Should be badass!