The brother support site offers linux driver downloads for the mfc-j430w in deb or rpm format - I would presume these work with cups, but you'll need to download them and take a look to be sure.
The epson support site states that they do not support linux, but they do offer a generic linux printer driver available in tar.gz format, which you'd need to compile. Again I would guess this works with cups, but you'd have to download it and check.