I had the KRELL K-300i integratged amp on my KEF LS50 Meta's and it was great. A shame I had to sell that unit. I could use it again today on the KEFs.
I am now using a CODA #16 on my LS50 Meta. I will soon upgrade that to Reference 1 Meta. The amp will stay. The CODA #8 is cheaper and also nice with the KEF LS50 but not at the level of the #16.
The PeachTree Nove 150 with the LS50 (not Meta) was just OK. Sold it.
I also had Benchmark AHB2 on the LS50 and liked it but that is a different sound from the KRELL and CODA. It is also a bit less powerful compared to the other 2. I loved the AHB2 sound but sold it because I got a PeachTree GAN1 (modded) that I thought was better than the AHB2 in some ways. I cannot recommend the GAN1 for the OP because it is too complicated to use (only 1 SPDIF digital input, no analog).
I may give my LS50 Meta to my cousin's kid for university. If she wants the LS50 Meta I would also give this with it.
Cambridge - Evo 75 All-in-One Player **OPEN BOX** - Music Direct (or the 150)