I've seen several wallets on the Mastercoin wiki, are any of them better than the others?

I'm sorry if this has already been explained and I missed it, but how exactly do Protoshares holders get their stake in Bitshares when they come out? I know that you get to keep the PTS for future DACs, but how do we get those Bitshares once they're mined in the Genesis Block? Will they be tied to the same public & private keys as our PTS so we just need to import the private keys on our Bitshares wallet, or is there some other mechanism for obtaining them?

In Bitcoin, the network shifted from cpu to gpu to fpga to asic mining. In every stage the shift created a movement toward a more centralized network. The key factor that cut people out at each stage is money, it's more expensive to mine on an asic than a gpu, which is more expensive than a cpu. In protoshares and bitshares, there is no opportunity for centralization through more advanced hardware. However, there is still the opportunity for centralization by means of a central point accumulating more cpus to mine. Do you think this could become a realistic possibility if bitshares or another momentum POW dac becomes large enough?