If it helps anybody, I went with:
https://store.weboost.com/products/drive-4gx
I got it on Amazon at 479. I think the prices are set so it doesn't really matter where you get it. I liked it over the similar model that is cheaper because it boosts 4G data and not just 3G and it's supposed to be good in rural areas as well as urban.
mainly because it has the maximum allowed db gain at 50 while the cradle version for 179 only gives 23.
Just got it in the mail and will update with review once I've got it hooked up.