I posted about a month ago that I'm getting a pair of Sennheiser 6XX (rebadged 650s) from Massdrop in a few months, ship date around Christmas. I know that I need a headphone amp for them. @Mike B and others here have probably forgot more about headphone amps than I've ever known (since I know very little, it's a pretty good guess!) I'm looking for some recommendations of ones I should be researching and if anyone has any personal experience with any of these and could give me their thoughts, I'd appreciate it very much. I'd like to stick to around $150 for the amp, could push it to $200 if I HAD to, just don't tell my wife, and bonus points if I can buy it on Amazon because I can use points I have saved I know that this is one of those things that can be very subjective, and everyone's opinion might be different, just looking for opinions! My primary source will be a Denon DP-300f record player. I'm not planning, at least not now, of hooking any digital sources to them so I'm not worried about a DAC at this time. Down the road I'll add a DAC but for now when I want to "seriously listen" it'll pretty much be my record player. Amps I'm looking at so far: Solid State Schiit Magni 2 and Magni 2 Uber (not sure I need the extras on the Uber, especially because I won't use the pre-amp outs) JDS Labs O2 Hybrid Schiit Vali 2 Bravo V2 Little Dot i+ Tube Little Dot MKII While nothing has been set in stone yet, and I'm absolutely willing to change my mind, I'm leaning away from the Vali, Bravo, and Little Dot i+ which are all hybrid amps. I figured if I was going to try a tube amp, the LD MKII might be a decent bet, or I might just stick with Solid State and go with the Magni or O2. What say you guys, any recommendations from this list or suggestions in my range that I'm not looking at?