Graphite has come a long way since it was first rolled out to the us (at affordable prices) but most golfers I see have steel shafts on their irons.
As long as you have tried the clubs out and likes how they feel and hit you are probably OK with them as your first set. I've not tried these particular clubs, but maybe someone else on the board has? Just remember to try and not spend big $$ on clubs that you might not like as you develop your golf swing / game.
Here is a
link to someone else's review of the LP's to help you with your decision as well. Good luck with your choice and welcome to the boards!