First off, I must say awesome! I am glad you can do something like that. I wish I could.
I have several guns in mind that I want to own, and I periodically update the list. I find that when I revisit the list weeks/months later, there are things on it I
don't want after all. Or when I actually get my hands on it, I change my mind. Naturally, there are plenty that are no question must-haves. And no question never-haves. But I get super anal retarded over it. I will read every thing I can, watch youtube videos, read forum posts, magazine articles, talk to people about it, scour them at gun shows, etc. etc. I know I am not unique with this, just giving you an idea of my approach.
Years ago I collected what I considered to be the best Super Nintendo game collection. I would get games "just because" of what they were, or that they "go along" with other things in the collection, or that they "fill a gap" or "round out" a genre. There were quite a few I didn't really care to play. Or even own. But I had them just to have. So now that I am pursuing guns more actively, and that they are more expensive, I am taking my time to do it right the first time. I never want to get a gun and sell it or trade it. I haven't yet. I feel every last one is a winner. I came close to wanting to rid myself of one- but after a year of aches and pains, I came out with exactly what I wanted. And it means all the more to me for it.
I think you will do well to take your time with it and get what appeals to you. I wouldn't get every last gun from a certain group, just to round out the group. Some rifles cost large amounts of money. That ties up a lot of cash for something you don't enjoy, but have just to have. Money that could be spent on getting something you like, or more ammo for what you have already.
To simplify- do this for yourself. Having what you want, knowing it through and through, and being able to drop the knowledge about it will be far more impressive than just owning it. That five minutes of showing someone something won't always equate the cost, heartache, stress etc. of locating/fixing/acquiring a certain piece. This time around, it's all about you.
Don't let outside sources dictate your parameters. Dictate them yourself. After all, it's your time and money. And if you do want it all just to have, more power to you.
Hope this helps.