For a practice amp I prefere using a battery powered preamp (for Piezo with HPF, if not already build into the bass) and a battery powered PA combo with 6 to 8 inch speaker. That way I can play with amplification outside or far from a power outlet, too, and do not need anything in addition for this situations. The battery powered PA combos can be found below € 500.-, if you keep it to practice levels of max 80 watt. Currently using active cabinet Monacor TXA-600 50W (battery powered, 6.5 inch) for that, but not available new since lots of years. If I would buy something new, the 100W JBL Eon One Compact for about € 580.- would be my choice.