I don't particularly care if I win RoA 3 or not as I found the first two a bit too hardcore and steep on the learning curve, but i'll gladly help out with testing if it will help with download quality.
Downloads are usually fine on my end, I get about 1500 to 1900 KB/sec in download speed. On occasion my downloads will start well below 1000 KB/sec, but if I restart the download a few times it usually clears up, this is using Google Chrome browser by the way. I've only ever had one corrupted download in my entire history with GOG, it was with Sacred Gold, but that happened almost 3 years ago.
You mentioned providers, would it help if you knew the name of my internet provider as well?