I like the way the Plague Brethren come packaged with the extra content, like the designer's notes and the John Blanche art cards, but agree that the price is steep. Given how many new kits are coming out for the Death Guard, I am with you on waiting a few weeks to see what else is to come.

Looking forward to seeing your unique take on the poxwalkers and DG marines.

Not sure on the basing question. You might want to go lighter desert bases if your Nurgle stuff is going to incorporate earth tones. That should help the finished product pop a bit.