Fraink, welcome. It's unclear what you mean by the "DTS" complaints. If this is something that can be solved without getting a new receiver, it's unlikely that the "more power" desire is a realistic need. Studies show that far less power is used than is sometimes imagined and keep in mind that you're not actually "sending" more power to the speakers when you buy an amp with a higher maximum output. The speakers use only as much as is needed and the rest is unused excess capacity.

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Enjoy the music, not the equipment.