The grinder matters more than the brewer. A good burr grinder gives an even grind, which means an even extraction and a sweeter cup.
For filter coffee, a hand grinder from around €80 is a great start. For espresso you need a grinder that can make very small adjustments; expect to spend €250 or more.
Blade grinders chop the coffee unevenly. They are better than pre-ground coffee, but not by much.