I am building my own FPGA rig and after a detailed analysis of all current algorithms, I can say that all algorithms will soon be mined by ASIC/FPGA except equihash and ethash.  Equihash will fall to ASIC's in about 6 years when we can get 144MB of SRAM on a single chip.  Ethash will not fall to ASICs ever, in my opinion.  The 2GB scratchpad is just too big.

Cryptonight and Cryptonight-Lite are mildly ASIC resistant.  This means that even a dedicated unit like the Giant-N cannot 'crush' GPU's.  It can beat them marginally in terms of ROI.  But for other coins, ASICs crush the GPU's by hundreds of times.



Eric