I started playing golf with some old blades that I got from my dad and played through high school. I stopped playing for 10 years and picked up the game again at 28. A lot had changed in the game of golf in those 10 years so I bought a set of Big Bertha irons because they were all the rage in 1994 :) And while the did help my game, I noticed it was only for a short period of time. I got myself down into the mid 80's and I was stuck. A friend/instructor suggested I switch to a smaller club and continue to work on my swing. I put a set of Titleist 962's in the bag and I won't lie it was a tough month or so after that. But soon there after I started getting more club on the ball, which spilt over to my other clubs as well ie driver and 3 wood. I think it was about 5 months after I switched I broke 80 for the first time.
I believe the only way to become a better player is to know what you are doing wrong. The feedback you get from a smaller head club is valuable information if you plan on improving.
I am currently playing a combo set Titleist 712CB 2-6 iron, and 712MB 7-PW
I hope you find what you are looking for, whichever set you choose. :)