You mentioned this but I forgot to answer. What differences are you worried about if you can't get an '06 manual yet? A couple of wires colors are about all the differences that you'll find for your changes.
Either way, the Clymer won't be any more up to date than the SSM at this time...there is always a time lag in any manual.
If you don't plan to go into any depth with an engine rebuild, then get the Clymer. You'll save $15-20. On the other hand, (though I haven't confirmed it) if you get the SSM, you are supposed to be able to get updates for new pages as the are released. That is why the SSM comes in a hard cover 7 ring binder with removable pages.
More money or more info? The choice is still yours...
PS - get the Clymer