So, some news for you that missed out on the high quality print run:
You can still get the high-res prints. The prices for those are now $80 and $100 respectively, for the 4x6' and 4x8' maps. These will come on a brand new material: Polypropylene Poster Paper. Don't let the name fool you. This stuff is just as tough as the banner, if not stronger. Banner material has a scrim weave to it. Tearing it is not unlike tearing plastic cloth. The polypropylene is similar, but the weave is almost microscopic. It's like trying to tear a raincoat, and just like the banner, it's waterproof.
Here's the best part: It can be printed double sided! The prices for double sided prints will be $120 for 4x6' maps, and $150 for 4x8's.
For all of the above mentioned map prices, get $10 off per print for orders of 2 or more units. As usual, shipping is free within the continental US.