Audio system for 1000€

Next month my new Honda Civic is to be delivered. Of course I am not satisfied with the standard loudspeakers. For this reason a new front and rear system, a subwoofer and a suitable power amplifier should be produced. Because I lack the experience when installing and selecting the components, I would like to handle this via a professional company (so installation + selection). Do you think with 1000 € you already get something good or should I invest more ? Thx Olli