Initial impressions on R1280T's is very good. Ripped out my old Logitech 2.1 for £15 jobbies and put these in their place. When I first got them, I had the speakers sitting on the floor and connected them up to my phone, they sounded very bassy, but once I got the speakers closer to the eye line, they really came alive. I have these positioned either side of my monitor, just slightly behind.
When I first started playing minecraft, I thought the music was coming from behind me. Explosive game videos on Steam were all handled really well (and loud, with plenty of bass), and settled in for an evening with Talos Principal. All in all I am very impressed with the build quality and expanded frequency range (sound has a lot more depth, especially in the mid range) over what I had before and would quite happily recommend these. They are sounding just a little tight at the moment, but to be expected from new speakers. I have these connected up to an Asus Xonar DX.