i'll also go for the sub-amp-seps setup rather than bass-tube+seps(hu powered).

nung una gusto ko din ng bass tube para tipid, pero in the long run, i upgraded din, suggestion ko is get a 4 chan amp, 2 chan for your seps and then the other 2 bridged for your sub...ganyan setup ko ngayon and okei na okei ako(hope the upgrade bug dont find me agad) hehehe, cost me 21k including install and sub box