If you want a large sweetspot, Ohms might be a good candidate for you. They are sold direct, but do have a 4 month home trial period with a money back guarantee. (I think you're still on the hook for return shipping, but still a good deal.)
I'm not a current owner, but have had them in the past and can recommend them for any short list of candidates.
I'm not a current owner, but have had them in the past and can recommend them for any short list of candidates.