So, is I am seeing a lot if they are efficient and easy to drive. Should I stick with the Meridian or give some other amps a chance? I have tubes in one of my home setups and love their sound.

So, the credit was from when I was looking at headphones back in 2013. I did a lot of lending library rentals of cans, amps, dacs etc. I ended up getting a pair of Audeze LCD-3's and pairing it with a McIntosh MHA100.

My wife swears she got them from Cable Co, but who knows. I got out of Headphones when we built our house with a custom theater/2 channel room (I was much more into jamming out to my B&W 802 D3's). 2 kids now and another on the way, so I figured why not go back to headphones for a few years!