Puritan 136 would be a solid ground for any future upgrades, i have the 156 for few months and i can say that i can't listen to my setup without it anymore , separation and clean background improvement is very clear after months of use, One thing i did, is changing the Puritan power cable, it was too much of filtration for my taste, Puritan is a very good investment for the long run.
Puritan 136 vs 156 for simple system
I am looking at these two options for a fairly simple two channel system. My set up is:
Musical Fidelity A1
Gustard R26 DAC
Eversolo A6 Streamer
What I am wondering here is would it really be worth it to upgrade to the 156 over the 136?