Greyhawk Grognard is working in “classic blue” maps of the levels by Joe “Jaerdaph” Bardales. The hand-drawn maps certainly have a certain old-school appeal, but the “classic blues” are also very sharp and very old-school.
I haven’t played any Castle of the Mad Archmage yet, but what I’ve looked over looks pretty sharp and worth a strong consideration. There is so much good stuff coming out that it’s tough to pick what to use. Who has enough time to read, plan, and play all this great material?