I agree with the need for a GPU miner but Zooko had mentioned his desire to crowdfund a CPU miner:
So perhaps we could set up 2 campaigns or we could propose that whoever commits to developing the GPU miner also make a CPU miner. Besides the CPU miner is already pretty far along in development: Zcash P2Pool Mining Development
I support this effort and will contribute to both but a fair start should not exclude those who do not have specialized GPU mining hardware. Both CPU and GPU will help with the goal of a decentralized network and protect against attacks.