We all know that space is often a premium (especially in an apartment) so why dont more speaker companies make tower speakers with powered subs? I mean you look at a tower speaker you could fit a Tweeter, woofer, and a subwoofer on the bottom (maybe only 8 inch subs but you would have one in each tower). Athena has something like that: here So why don't more companies do this? is it a profit factor? or is it because it is not the best way to position a sub into a HT system? For myself I would like this set up because it looks cleaner and I dont have a big cube (or cylinder for some peeps) to the side taking up space. So what is everyones input on this?