Darren,
That's almost the same progression that I'm following.
Only difference is the irons. I have the Cally Mavric L52, then the L85 Cally Mavrics (I like a slower meter 4,4 as opposed to the 3.0 that the L90 TM has).
I just picked up the L76 and L78 Vokey wedges..I'm halfway through L79, and when I get to L80, I'm going to grab a 3rd Vokey wedge.
Jeff