What Should I Buy as a 2nd Razor??

[Sluggo]

I have a fatboy (1961) that I found for a great price, but I think I would like to start collecting vintage Gillette razors. What do you think I should get next?

The community's thoughts are always appreciated!!!

[theperfectstorm]

Your basic flare-tip SS is solid, functional, tough, simple and reliable. No collection of user razors should be without one (or a couple--they make fine travel razors)

In addition, they are (relatively speaking) cheap and plentiful.

[ScYcS]

I'd get a 1947-1951 Superspeed.

[whitebar]

A superspeed would be a great choice.

[Sluggo]

What are the differences between the red tip or a flare tip in terms of how aggressive the shave is?