"Keep this in mind With loudspeakers under $3'k you will jot get real low bass"
Assuming that's true (and its not), so what? Most speakers over 3k don't go all the way down either.
"If on s budget a good stand mount and a decent powered sub would get you much more low bass.
At the expense of overall sound quality. System matching is everything. Subs are best used with full range speakers.That's why they're called subs, and not bass speakers. If you use and stand mount speaker and a sub, what do you do about the frequencies that are too low for the small speakers to play, and are too high for the subs? You end up with a hole where some of the music is supposed to be, and the subwoofer never was. Besides, these components are not generic and interchangeable. You can't just throw them in any system without consequence and expect good results. If the OP buys a full range speaker like the Vandersteen Model 1, he can add a matching sub at any time, and will have a very easy time integrating it into his system because both pieces are designed to work together.