Basically sa printer the wider the color gamut are represented by the inks the more vibrant the pictures will be so if you'll go with CMYK inks mediocre ang labas. I am currently using a Canon Pixma PRO-100 but this does not come cheap but the photos are great and would definitely wow your clients. It will do borderless printing up to A3+. It will cost you around less than 30,000 pesos. It is An 8-colour dye ink.
I also have an Epson Stylus Photo 1390 with almost the same quality but not as vivid the colors are. I forget kung magkano ko nabili. 6-colour ink dye sya.
IMHO, Canon inks are the best in printing pictures even at low settings you won't be disappointed.