While I don't know the answer to your question regarding early renewal, I will say this. You will not get anywhere near the data on Page Plus that you have on Virgin Mobile.
My suggestion would be, if you can tolerate the VM/Sprint coverage, why not do both? That is exactly what I do. I use the Optimus V for my unlimited data at $25/month and I use an HTC Ozone (with a NODATA app installed) on Page Plus for Unlimited Talk and Text for $41/month. Are there times when I cannot use my Optimus due to no coverage? You bet. Can I live with it while continuing to be able to Talk and Text on Page Plus? You betcha.
Not saying this system would work for you, but for me, it certainly does and I do not have to worry about going over on minutes, text, or data every month.