Efficient floorstndrs. to reach above furniture


I'm getting nowhere except frustrated trying to fill large space with sound from Silverline 17.5 monitors. Subs didn't work. I'm now soliciting suggestions for efficient floorstanders with drivers located near top of cabinet to surmount obstructing furniture. Space is: 17 X 30 w/ 10 foot ceilings and adjoining 2 - storey entry. Power: Creek Creek 5350 se., which I may have to upgrade. My total budget for speakers and more powerful amp is
$ 4000.00 (used). Thanks!
stuartk
JBL Performance series with the matching powered subwoofer (PS1400 and PT800)and a Bryston 4B ST and a Bryston BP-25. You will be exchanging good looks and beautfiful cabinetry for a room filling rocking experience...
Shadome, it appears, from a quick search of used gear on audiogon, that what you suggest would greatly exceed my budget. Jaybo, do you have any particular speakers in mind?
Def Tech Mythos ST's, tall, efficient, sound good and have tons of bass to boot, keep your amp and buy these new and be done.