I am thinking about FIFO in 2 timing combination

I just think about DSP and MCU links, because of two timing are different, so I want to add one memory to handle with, I think FIFO DRAM can be potential, I guess CYPRESS,IDT, AVERLOGIC has it, but I don't know which company can provide better service, if someone knows about these 3 companies FIFO please give me suggestion.