Acceleration is only relevant for xy. Here it depends more on preferences unless you start loosing steps. 500 is slow acceleration resulting in smooth moves. 2000 is a good fast value but printer will become more jerky, so you might get influences from vibration in your print.
Speed is also more quality driven then real possible speed, except for travel moves where you want to be fast with safety margin to not loose steps. 30 mm/s is a slow speed giving good results. At some speed your extruder/hotend starts to loose quality. So keep below that speed for visible parts. For infill you can go higher as long as lines keep lines and don't just drag filament through your model.
