Microsoft took the wraps off of the all-new Surface Pro 4 and Surface Book just yesterday, with pre-orders going up direct from Microsoft almost immediately. If you'd rather put your order in through Amazon, however, you can now do so, with the retailer offering several configurations of each device, fulfilled by Microsoft.
For the Surface Pro 4, you're looking at several different configuration options ranging from the base Core M with 128GB of storage model all the way up to the Core i7 with 512 GB of storage. There are a couple of gaps to be aware of, especially if you had your heart set on and i7 model with 512GB of storage and 16GB of RAM, but you're pretty well covered otherwise.
Likewise, the Surface Book has a few different configuration options available, but the Core i7 model is only available with a fully maxed out 16GB of RAM and 512GB of storage. If you wanted less storage or RAM, you'll have to deal with a Core i5 processor if you're ordering through Amazon.
If you're interested in checking out the Amazon listings, be sure to hit up the links below. And let us know in the comments which configuration you're planning to pick up!
Update: And just like that, Best Buy has announced pre-orders for both the Surface Pro 4 and Surface Book as well. You can find a link to pre-orders on Best Buy's site below if you're interested.