What power brake booster/master cylinder should I go with?

[Orange '71 GMC]

Well, I am on round two of my truck. Restoration/rebuild was finished in 2000, have shown it since then, but haven't driven it much. Now I am wanting to drive it more, so I am doing some of the things I didn't do before now.

One thing I wanted to do was get the firewall cleaned up a little bit. So I am needing to get my factory power brake booster replaced. It is really not a pretty site. You can pretty much see it in this picture.

What I need to know is really just one thing. Which one looks the best. And by looks the best - I pretty much mean - the least cumbersome. I think a lot of the aftermarket ones tend to stick out quite a bit - even though the booster is smaller in diameter.

I am basically looking at three different ones.
This one from Master Power Brakes.
This one (original style) from TuffStuff.
and
This one from Tuff Stuff (7" Dual Diaphram).

So what do you guys think would be my best option - or are there any that I should consider outside of those three - I am pretty open to suggestions here. Surprisingly, I am not really totally crazy about the idea of the chrome ones, but they are at least nice looking.

Just trying to get something that will point me in one direction or another. If anyone has any experience with any of this - please chime in with what you know. Thanks!