Higher printer resolution means doesn’t necessarily mean better print quality. The surest proof of quality is to compare prints and read product reviews.
Higher price doesn’t necessarily equal higher quality, either. Experts say that most printers use the same print engine in many different models. The higher price reflects additional features such as faster print speeds, printing on wider paper, LCD displays, or slots that enable direct printing from camera memory cards.
More ink colors will give you more lifelike images. Six ink colors do a very good job. Eight are awesome.
If you use your printer often, the cost of ink and paper will exceed the original purchase price. You definitely save with a printer that has individual ink tanks so you only change the ones that run dry. Product reviews will often clue you in to the cost of materials.