Welcome to the forums!
It looks like you've done your homework. At a glance, everything looks compatible. While I know some AM2+ mobos could support Phenom II CPUs, I would select one of the AM3 mobos to be on the safe side. Also, I have no Linux experience so maybe someone else could help you with compatibility with this.
I am curious: where are you getting these components? And is there a reason you're going with such old equipment?
I get old parts from Ebay, Amazon,+many legacy part suppliers. Old equiptments to work better with old linux kernels I think.