Genelec 6010 speaker and 5040A subwoofer is their basic system and good for small rooms up to 2000 cubic feet.  We haven't heard a better small speaker yet.

Genelec HT208B speaker and HTS4B subwoofer good for medium sized rooms up to 4000 cubic feet.  These will destroy 99.78% of all home theaters.

The Monster!!!  Genelec 1026A speaker and HTS6B subwoofer.  This is extreme, if you want to have reference levels 50 feet away in rooms up to 30,000 cubic feet.  This is your system.  No regular home theater loud speaker I know of can power a room that size with crystal clear sound.  The speaker is tough to tell from the picture but it is big!  Over 3 feet tall, almost 4 feet wide and more than 2' deep and weighs more than 150 pounds.  This doesn't go into your average living room, this is made to power a big area!

Genelec is all business.  As you can see by the above pictures many might not call them the prettiest speakers.  You pay for technology and performance with Genelec.  They don't have pretty wood finished cabinets in fancy designs.  They are basic black boxes except the smallest ones.  If you do not want your speaker showing in your room there use their inwall solutions.  All there speakers sound the same so you do not give up anything for aesthetics..