It's very recently gotten easier to throw more hardware at the problem :-)

http://www.raspberrypi.org/raspberry-pi-2-on-sale/

Raspberry Pi 2 is now on sale for $35 (the same price as the existing Model B+), featuring:

• A 900MHz quad-core ARM Cortex-A7 CPU (~6x performance)
• 1GB LPDDR2 SDRAM (2x memory)
• Complete compatibility with Raspberry Pi 1

Because it has an ARMv7 processor, it can run the full range of ARM GNU/Linux distributions, including Snappy Ubuntu Core, as well as Microsoft Windows 10.