Beautiful looking meat, perfectly cooked, and an all around great looking meal. Like!
Where I am, the cut goes under a few different names,; top sirloin cap, rump cap or cover, coulotte, or picanha. My preference is the picanha as, unlike the coulette, it's left untrimmed of the roughly 1/2" fat cap. Both the coulette and picanha are extremely flavorful cuts of beef, but I think that the fat on the picanha adds another level of richness to the taste. Also, my local butcher always has picanhas available. Angus choice goes for $12/lb. and prime is $18/lb.
BTW, for those whose butcher looks at them cross eyed when asked about the cut, the NAMP number for the whole roast, around 2 1/2-3 lbs., is 184D. If it's cut and sold as steaks, I believe the number is 1184D.