Isabel brahma x light or buff brahma

I am planning to buy an Isabel Brahma but I can only afford one at the moment. Should I get the Hen or the Rooster? I have Light and Buff brahmas and I intend to breed them with an isabel until I can get my hands on another one so I can get pure chicks.

Silkie x Brahmas?! BackYard Chickens - Learn How to Raise Chickens

Brahma chicken talk, Page 2

Buff Laced Brahma, Page 10

Palomino Brahmas, Page 2

Silkie x Brahmas?! BackYard Chickens - Learn How to Raise Chickens

Light Brahma pullets BackYard Chickens - Learn How to Raise Chickens

Buff Laced Brahma, Page 10

Standards for Buff Brahma Bantams and Silkies

Light Brahma pullets BackYard Chickens - Learn How to Raise Chickens

BUFF, Page 3

Buff Laced Brahma, Page 10

Brahma x RIR, Brahma x buff Orpington