At some point i just wanted the downloads to be at the maximum speed provided by the global proxy, so i did a hardware upgrade of the AMD E-350D:

• AMD A10-6800K which is highly overpowered but also usable for different tasks in case my study is finished and i move somewhere else with more moderate internet connections
• 4GB DDR3 RAM
• 2x Intel Gbit Desktop Adapter (reliable, fast and driver support for linux/unix is awesome)
• silenced case

i maxed the download speed of the proxy at 80-90MB/s, while the cpu chills at ~10% which is pretty nice.