if your budget is only $300, you can stick with one amp or get the dedicated single amp for your current speakers. if you have a space, you can go vintage valley such as klipsch heresy which are $500 in good condition.
you can also go active with wharfdale titan 12, a very well regarded pro audio speaker that performs well for home audio.
you can also go active with wharfdale titan 12, a very well regarded pro audio speaker that performs well for home audio.