I do the same kind of thing, but my lists are less detailed.
When I try and buy for a diorama, it either doent get finished, or changed mid stream. (IE that kubelwagen dio)
When I go shopping online I have a general idea of what I want. I want to do a large figure, like 1/16th or something of that nature. I have the verlinden kubelwagen crew in that scale, but I dont have a kubelwagen to go with them, so Im not gona doem yet. Some of the other kits I want arent avaliable yet, like the IJA Type 1.
I have a few things set on my list that I am going to get. WWI German heavy battle tank (Tauro kit, on Squadron's site), Pre War Akagi 1/700 and a set of IJN bi-plane bombers/fighters to go with it (both hasegawa, a few 1/35 figure kits (Masterbox german/russian hand to hand combat). I WAS going to get the Zvezda red army sniper kits, for the female sniper, but, checking it out online, the figure's face is molded horribly.) I realised I had enough and put both the samurai warlord, and the French Guard drummer on my list. But I'm at a loss for what to get otherwise. I went from no cash, to to much cash.(literally, 0 up... 2oo for christmas, and 180 from my Bday +25$ debit gift card)