What would be the best amp to match to these? I already have a schiitz modi dac so I am probably only looking to upgrade my amplifier, which is a magni 2. Also, what sort of difference should I expect with a so called "higher quality" amplifier? What does it actually do? What difference does it actually make to the sound? The magni 2 sounds pretty good, I'm just curious to know what if I could get it to sound better than it already does.
Since the LCD-2 is not difficult to drive your Magni2 does a decent job as you noted.
Of the higher end amps I've heard the LCD-2 on the ones that made the most noticeable difference from my Lyr2, Ember and Teac AH-01: Liquid Glass, Liquid Carbon, Hugo, HA-501 and MHA-100, the sound gets better dynamics, weight in the bass as well as a bit better extension both lower and higher and with the Liquid Glass and MHA-100 a better defined sound stage.