Hello, i'm totally new to writing posts in english so please forgive me mistakes and bad grammar

.
2 years ago I got my first mechanical keyboard...I had no idea what I was buying, but it was klicky and shiny so I had to buy it

(Razer Blackwidow).
A couple of weeks ago is started looking for a TKL keyboard and I was disappointed of the amount of TKL with DE ISO layout....there are only a couple of them
available and sadly no 75% ones like the Noppoo Choc Mini/KC84/KBT Race. After reading like a billion german forum posts i found GH and fell in love.
I decided to switch to ANSI just to get the possibilty of getting cool keycaps and a proper mechanical keyboard, now i have to ask u some questions( probably asked x times before)

I can't decide, which one should i get.
There is the Ducky Shine 3 Slim, Noppoo , KC84 and the Filco Majestouch Ninja Tenkeyless.
I really like the 75% layout, because of the F-Key positioning and I also like the clean look of the TKL ones.
What's the best in terms of quality and durability ? I really love some of the keycaps i saw in different posts here,
are there any compatibility problems with keycaps or can i use like all the keycaps for every keyboard ? Is there
a good site out there to order an ANSI keyboard and keycaps from germany without an enormous amount of shipping costs ?
Which of those keyboards is the best in your opinion and why ?
Sorry for being a newb.
Thanks to all of you!
NevS