tecknot
I was wondering, why Slash? There are so many other well known and much better players that have attention to their tone; Slash never enters my mind. Say, Eric Johnson, Adrien Belew, David Gilmore, Jimmy Page, Eddie Van Halen, Edge, Neil Giraldo, Roger Fisher (of early Heart fame)...and on, and on. I gotta say, IK is 'jumping the shark' here. Slash is a one trick pony of a player. There's not much more to say about that. He's certainly not the only guitarist to plug into a Marshal, that's for sure. Hey, I hear Page isn't doing anything nowadays.
If I were to market a product to the masses and put a guitar player's face on it, besides Jimi Hendrix, Slash would probably be on top of my list - strictly from an advertising point of view. Not because he is the best, but he is probably the most recognizable guitar player out there. You can draw Slash with 3 lines, and anyone who hasn't been in a coma for the last 20 years will associate that w/ guitar. Big curly hair, a top hat, a pair of round glasses - there you go.
Of those you mentioned, Gilmour would probably be my personal pick. Page is way too diverse - it's part of his legacy, to have covered so many tones. Johnson gives me tooth aches - I never could figure what it is about his "tone". Great player, but, tone? Really?
Edge, well, as much as I dig U2, I can't think of the Edge as a brilliant guitar player - anyway, no way better than Slash, as average as you may find him. Plus, you can already daisy chain delays in AT if you want to do the Edge thing. ;)
Plus, between you and me, what do you really think the main target audience for this type of product is? I know very few accomplished musicians who use other musicians signature stuff. They may own it, just for fun, but I can't imagine, say, Eric Clapton, climbing onstage w/ a Kurt Cobain signature guitar and plug it into a Slash signature Marshall - or the iPad version of it.