Update: My top tanks are now the KV-3, KV-1S, and VK 3601 (H). I just unlocked the PZ IV Tiger and have the Jagdpanzer IV unlocked.
Looks like I'll be grinding the KV-1S tommorw on my day off to get closer to unlocking that IS. I prefer the KV-1S to the KV-3, fits my playing style more.
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