Buying Micro NIche Domain Question

I have a niche with my selected criteria im looking to target for and i have a lot of domains i can pick.. On market samurai it states.

Lets say my niche was chicken sheds

I can pick
echickensheds.com score 93
chickenshedstips.com 88
chickenshedusa.com 87


Even do echickensheds has a score of 93 does it not take away from the sound of the domain but is it still the best for seo ??

Im probably being over picky but it seems whatever niche i find u can most likely stick a letter behind the keyword and u,ll get it should i just take it and be happy ?

Any ideas, advice please ??

the three options make no differences i believe