id say PS3 to give you a matched set from the criteria you describe, they work and wear well. You wont go wrong.
What i would say is that given my limited PSS experience, the PSS is far superior to the PS3 in everyway so far (wear rate pending), so you wont be full optimising the setup (but that doesnt sound like that too much of a concern)
I shall be replacing my PS3 rears with PSS very soon to match my front ones, but the PS3 have performed well (and indeed work well for me with a slighter looser rear end bias)