FPGA development boards for Deep Learning

Hi everyone,

I am a beginner to FPGA and going to have a project implementing Deep Learning algorithms on FPGAs using OpenCL. So I am looking for FPGA development boards to submit to my boss, and he will decide to buy. As far as I know, Cyclone, Arria, Stratix board series support OpenCL. But there are different boards from different vendors like Terasic, Intel,... Can anyone help me, which board should I buy on all series Cyclone,Arria,Stratix ?

Thanks