Thank you for posting your initial impressions of your L2i-SE!
There are two ways to go:
1) Go with the L2 Preamplifier to drive your M160s.
2) Go with the L2i-SE, and then you can turn on/off the speaker output stage and compare it to your M160s.
You get more flexibility this way (you can use the L2i-SE as a preamp, or integrated amp).
In either case above, you will get a significant upgrade compared to your LIO, and you can transfer your LIO DAC 2.0 into either
If you have additional questions, feel free to email me.