ARC has better controlled bass and more quiet than EAR. You should be OK with Shelter having in mind sencitive and high-gain preamp like Line3.
EAR 834 vs. ARC PH-3?
Both pieces sell for similar amount in used market, but EAR has adjustable gain. Which one would you choose? What about the older Sonic Frontiers SFP-1 Signature? Planning to use it with medium output cartridge (Shelter?) on VPI Aries/JMW. Rest of the system is all tube (SF Line 3 SE, BAT VK-75SE).