A+, welcome. It's unlikely that you'll find anyone here who's heard(or even heard-of)the A5s. Their site doesn't have any performance specs for the speaker itself, just a few for the amplifier, and since the M3s are such fine speakers it seems unlikely that the A5s would be comparable.
My suggestion would be to order the M3s and try them without a sub at least at first, which is probably the only way that you'll know if the bass will suffice.
I'd also suggest that you get an HT receiver to allow for future expansion into surround sound, even if you intend only stereo at this time. An excellent buy is the
factory refurbished Onkyo 504 , which is available for $159 after applying $10 credit for registering in "Club Onkyo", and has free shipping.
