Alexandru Mihaita,
Check out a box-shelf/sub combination.
The B&W's 600 series - 685 have a sweet sound - actually have seen it confused for Martin and logans. Meaning - the 2 channel setup was temporally next to small M&L setup. i was listening to the B&W's and several other customers thought i was listening to the M&L. The B&W image really well, sound good, look good and would ease the wife approval side.
BTW, I was listening to jazz, blues and classical music.

They where/are ~$600 USD. The left over $ could be used for a sub.

this is just a thought - there would be other box shelf that would work....
Later