I'm looking to upgrade the Rockshox Pilot SL (85mm) that's on my 2005 6700. Since this is my secondary bike, I don't want to throw big money at the bike. I'm riding in southern New York on some pretty rooty and rocky single track. I don't race the bike.

Does anyone have any suggestions on a possible fork upgrade?

I was thinking of putting on Marzocchi MX Pro ETA (105mm). Aside from the obvious head angle change, would there be any adverse effects to putting a 100mm or 105mm fork on my bike?

Thanks in advance.