jet tec cartridges for epsom seem to be the best. no clogging more life than epsom genuine far cheaper particularly if bought in larger quantities. I find the epson px700 to be thirsty on ink and would have to bin it if I had to use genuine epsom consumables.Luckily jet tec seem reliable , clog free (unlike very cheap compatables that use incorrect ink type) and make epsom printing affordable.
Update used these for several months and found they clog the heads and confuse the printer software when they are nearly empty. had to change all five cartridges at once last month - no longer recommended - there is no cheap way of getting ink for the epsom printer.