I've been looking at the Mizuno blades too (MP33, MP37 and now MP32).
I agree - they look superb, and if you want my advise, buy a set of blades as it will improve your ball striking no-end.
If your good enough to play off 5, then these clubs should be fine for you.
The other thing to consider is that due to technology advances, blades have become a little bit easier to hit than they might look, and the feel is something you cant experience from a non-blade club.
I play off 2, and have had blades for a few years, and you'll be surprised at how great they are.
Get 'em brought!