I know this has been answered 100x over, but I just feel better asking since I haven't used OSX for very long (well since Dec, but never through a full OS reinstall/upgrade) and would just like to ease my conscious.
I plan to do a full installation (erase). So I can simply backup my machine using TM? Backup all the .DMG/etc files that I have saved (which should be in TM anyhow) as well?
Then choose the option to erase. When SL is running navigate to my TM folders (1TB external HDD) and restore my iPhoto/iTunes media folders to the newly created ones (after I reinstall iTunes/etc) and it will be fine? I wont have any permission issues like I do accessing another partition's saved info?
Other applications aren't a big deal for me as I have all the discs and stuff and I dont have many addons so it's not a major deal to re-load them.
My main concern is my saved content for iTunes and iPhoto. I have about 40gigs worth of photos in iPhoto (i have a 3yr old so my wife and I are ALWAYS snapping photos of her with the Digital Rebel for memories) and about 60gb of music. I could "deal" with losing the music ... but not the photo memories. I'd seriously freak out.
So that will work?
Otherwise I'm just gonig with the upgrade option, but I always like fresh installs personally.