I love this thread, and prefer Modern design, unfortunately it's sometimes hard to acheive with an aquarium.
My tank/room is far from Modern (my GF prefers traditional/contemporary) but I definitely tried to have the interior of the tank designed as minimalist as possible, so I think it somewhat fits the topic of this thread...plus there hasn't been any member's tanks pics in awhile!
Here's a shot from about a month ago (This was after my cycle and I'd just added the clowns, since then I've added snails/cleaner shrimp and my rock has colored up nicely)
<a href="http://www.flickr.com/photos/philbys/2123314795/" title="another FTS by MrPhilby, on Flickr"><img src="http://farm3.static.flickr.com/2300/2123314795_d61442fee1.jpg" width="500" height="375" alt="another FTS" /></a>
Here's a shot of the tank/stand/canopy prior to getting wet.
<a href="http://www.flickr.com/photos/philbys/1865054504/" title="SA400013 by MrPhilby, on Flickr"><img src="http://farm3.static.flickr.com/2042/1865054504_e737d93b50.jpg" width="500" height="375" alt="SA400013" /></a>
And here's a shot to show that the tank itself is definitely not minimalist/modern - but like someone earlier said this is a science project and it's hard to blend the two. This is what I had to do "behind" the scenes to get the actual display to look minimal. This is the CL and return plumbing - it's even messier now because this pic is prior to the wiring for the lights...
<a href="http://www.flickr.com/photos/philbys/1969803706/" title="CL from L by MrPhilby, on Flickr"><img src="http://farm3.static.flickr.com/2062/1969803706_d195f9984e.jpg" width="375" height="500" alt="CL from L" /></a>