manu, this is crazy. this will never end. i have a couple of small bits of advice. I am probably not any older than you, but with regard to these couple of things i am going to insist that i am wiser. so here goes:
a) there will always be upgrades available. there will always be more bass available. there will always be places to throw your money. there will always be dealers trying to sell you their most expensive gear (that's their job after all). this will never stop. you will never be happy.
b) so therefore, why don't you just listen to the music and the movies, and enjoy them, rather than going out in search of lower bass or bigger/better equipment. All of us audio-fools could do with this advice, but none more so right now than you manu-ji.
I can guarantee you that the ULS 15 will not keep you happy. In 2 months you'll want something else. Shall we bet money on that?
Now of course I know it's your money and you're free to do what you want with it, but please please do seriously consider 'settling' on a subwoofer and then listening to the music and the movies. Like quitting smoking, try quitting upgrading. Make a resolution that you won't upgrade for 6 months, and then see how long you can push it.
Either ways, all the best