Smart move to up budget. If it was me and I owned the Rogue I would find a warm tube like solid state that has high current that doubles between 4 and 8 ohms.
The Rogue is not a lush tube preamp but when matched with a warm side of neutral amp it work very well.
Since you upped budget use a little money and upgrade the rubes in the Rogue if it if it hasn’t been done you will be rewarded.
Do a little research and find a amp that sells fairly quick if you want to try others and never loose a dime. Usually the ones that sell quick do so for a reason.