Welcome to Shot Talk.
As far as iron selection goes, it sound like your not totally enthralled with the super game improvement irons (Big Bertha/Slingshot) and are looking for more of a game improvement iron. I an not all that familiar with the Cobra line up, but if you like the X20 you should be getting some good game improvement features with a more traditional head shape.
The real question of which irons will suit you best comes down to performance. While good feel is a great quality to have in your irons, if you can not hit them where you want to consistantly they do not help you at all. What kind of ball flight are you getting with the X-20 and Cobras? Too low, too high, too far left, or too far right? If your getting consistant, predictable, and acceptable ball flight from multiple sets of irons, then you can narrow down your choice to feel.
ualtim