I play blades / semi blades and always have ... I like the feel, I like the smaller head with thin top line and I can work ball without having to worry about offset on the
irons.
I'd never play cavity backs, unless I was paid a LOT of money.
If you're looking for forgiveness, then blades/semi blades are no good to you. Any misque and you're buggered ... But, if you don't need the forgiveness and can work the ball enough to take advantage of having no offset, blades or semi's are for you.
Don't kid yourself ... less than half of the PGA tour pros use cavity backs!
Trust me on this ... They may endorse
Callaway but lots of them actually have Hogan
irons in the bag or the new forged X-Tour
irons. The vast majority of
Mizuno and
Cleveland players use blades / semi blade models. Almost all of the
Titleist boys use the new MB/CB
irons all of which are blade-types.
Trust me, cavity backs are not as popular on any of the large tours as you think, I've been there.
Why don't you try the Hogan Edge Pro? They're a blade but with a bit of forgiveness in the longer
irons. I have a set I was given by the tour van at a tournament and liked them very much ... They have a slight muscle back, thin top line ... very nice and great feel. I'd suggest you start there.