Not sure how well the Fire Reds will work for you, the reason being from what i've heard from all the shops in Hong Kong i've talked to, they breeders don't sell Fire Red Shrimp Females to LFS' or outsiders so it may turn out to be impossible for you to breed (IF that is the case)... which in all honesty seems to make sense since in all the time i've seen fire reds for sale over here (which is at least 2-3 years+ now), i've never seen one that was pregnant...
And its not like the shops are selling pregnant shrimp either, since i've seen King Kongs, CRS, Cherries etc all berried which were for sale, but not once seen a Fire Red which was holding a clutch... even when i kept a tank full of them never had one that berried in over a year...
Either way, hopefully you'll get a mix of both male and female to help you kick start your colony and business...