What is it about the Silverlines that you wish to improve upon? There are numerous high quality speakers that fit your aesthetic criteria, many of which have already been mentioned. With some additional information you may receive responses more narrowly tailored to your preferences. A "house sound," by definition, varies from manufacturer to manufacturer, so I think you would be well served to give us an idea of your goals and priorities.
Kind regards,
EthanH
Kind regards,
EthanH