Looking for an Amp that can efficiently drive LCD 2 and JH16 well.

Perhaps check out the Nuforce Icon HDP (DAC/HPAmp/PreAmp). 

From a review:

"Audio inputs include B-type USB, MacBook-style 3.5mm mini optical digital/analog (adapter included), coax digital and RCA analog. The front identifies these inputs as U, D and A. Variable outputs are a 6.3mm headphone socket with included mini adaptor and one pair of very high-quality RCA pre-outs. For headfi, gain and drive are more than sufficient for even the inefficient 37-ohm HifiMan HE-5LE orthodynamics."  More at:   http://www.6moons.com/audioreviews/nuforce14/hdp.html

Fron another review:

"The amplifier section of NuForces’s Icon HDP offers low distortion, sonic clarity and good drive capability, and it is backed by a very good DAC. The Icon HDP suits headphones with strong bass or less than vivid midrange particularly well.

SPECS & PRICING

NuForce Icon HDP Headphone Amplifier/DAC/Preamp

Frequency Response: 10Hz -100 kHz, - 0.5 dB
THD+Noise:0.001% (1ｋHz)
Analog Inputs: RCA or 3.5mm
Digital Inputs: S/PDIF - Coaxial or 3.5mm Optical, 24 bit/192 kHz
USB DAC: USB 1.0 and 1.1 up to 44.1kHz/16-bit, USB 2.0 Full-Speed up to 96kHz/24-bit
Analog Outputs: RCA
RCA Output Impedance: 100 Ohm
Headphone Output Impedance (6.3mm full-size headphone output jack): 10 Ohm
Headphone power output:

    * 288mW rms @ 30 Ohm
    * 210mW rms @ 120 Ohm
    * 152mW rms @ 300 Ohm
    * 123mW rms @ 500 Ohm
    * 96mW rms @ 600 Ohm

Power Supply:100-240 VAC
Dimensions (H x W x D): 6” x 1” x 4.5 d x 1”
Price: $449 as tested"

http://www.avguide.com/review/nuforce-icon-hdp-headphone-ampdacpreamp-playback-36?page=2

I'm using the HDP as a USB DAC and headphone amp and am really impressed with the SQ and enjoying it very much.  I really like the combination of the HDP plus the HD650's and think there is very good synergy with that combination.  I feel that I've gotten really great value for my money.  And the SQ has just been getting better and better with more use time on these components and it's pretty fantastic now at this point (about 2 months in).  

You can also add the HA-160D to your list. 

Guys from burson audio came out with this toy (dac/amp combo) and most people are loving it. (including me )

You'll be impressed how natural your music sound with it. 

Quote:

Originally Posted by Junliang 

What do you guys think about the meier audio concerto ?
Performance wise in driving a high sensitivity iem like jh16 and the LCD 2 ?

And since we are at it, what do you guys think about stagedac + concerto for lcd and jh16 ?

I ordered the Concerto and StageDAC for my future purchase for either the LCD-2 or the T1... or both.