How's this for a bit more meaty board at $299.

http://liliputing.com/2016/03/lemaker-cello-dev-board-features-amds-64-bit-arm-chip.html

It's got the AMD quad core A57.
It also has a PCIe x16 slot, SATA, GigE and USB3.0.
So ARM cores but with more useful interfaces.


I think it's all about to get interesting.
Intel has been ahead for a long time because of their process tech and because they're invariably first to deploy it.
For 10nm it's looking like that's all about to change, Samsung and TSMC both look like they'll be in production before Intel.
Intel has also had an advantage because they are not limited by phone power constraints (anything over a few Watts is to hot for a phone).
Desktops or servers don't have these power constraints so can use higher clock speeds and faster memory.

So far the ARM server chips have been on processes a node or 2 behind so nothing to worry Intel. However use a cutting edge process and all that changes. There's a lot of companies who want to build ARM server chips and once one does it they'll all follow. Qualcomm are jumping in at 16nm.

As I said, it's all about to get rather interesting.