I might have to think about a Mod 55 next. I hadn't even heard of a 55 until I got the bug for my 64. If I can scrape the funds up I'll try to get a 55. Also , I never had a desire for a lever action anything before my 64 , but I sure got the bug now !
Just beware that some 55s are non-takedown. I discovered this upon searching for a suitable 55, not knowing before-hand that there were some 55s that were not takedown models. And just like you, once I got my 64 (about 6 months ago), I have been bitten hard by the bug, and am searching out more Winchester levers!