Callaway makes very good irons. However I do not believe they are the number one irons made. They were in 2008 based on survey numbers sold. This year the Burners are the number one irons sold so far IIRC.
#1 is subjective if you mean the way they play. I love Callaway irons and have played them for years as they work for me. My bro-in-law hates Callaway irons and we typically like very similar stuff so there ya go. Subjectivity.
I'm playing X-14 pros. They're chunky, but not as much as Big Berthas, have less offset, and are really forgiving. I bought them used from Callawaygolfpreowned.com - they were in great condition and cheap.