Something else to be aware of with Ryanair cabin baggage allowances, it's 10KG maximum as well. As for any particular bags, I don't know, I had a smallish backpack last time I flew with them to Ireland.
Why do these two dudes look like they might be up to no good, or perhaps part of a VIP close-protection squad. From their looks I'd assume they're packing heat or highly trained in martial arts, and mean "business".
How did I ever live without Transmission BitTorrent on the Mac?
I often stream music as well, but can only do it at home or office on WiFi, so I do download and store music on the phone, like for when travelling. Streaming over 4G could be prohibitively expensive, unless one has a truly unlimited wireless data plan. Also good luck if trying to listen to on-line streaming music on a plane.