I have the same Rogue RP5 and the ST100. Front speakers are Ascend Towers with RAAL. Sound is outstanding.
That said, the Towers with RAAL new are beyond your budget. Sometimes they come available on the used market (I've seen them on usaudiomart). Not a Tower, but the Ascend Sierra 2EX is a close second per user reviews - I've not heard these but am considering upgrading my S2's to the EX version).
That said, the Towers with RAAL new are beyond your budget. Sometimes they come available on the used market (I've seen them on usaudiomart). Not a Tower, but the Ascend Sierra 2EX is a close second per user reviews - I've not heard these but am considering upgrading my S2's to the EX version).