NAD C 375BEE Integrated Amp Replacement Recommendations


I use the NAD C375BEE integrated with Klipsch RF-7 II speakers. Do you have any experience, or can you recommend an integrated with the grunt (bass weight) and smooth sound of the NAD C 375BE, but more refinement?   Looking not to spend more than about $2500.

Musical Fidelity M5si?
Luxman 505ux?
Musical Fidelity A5?
What have you heard; What's your take? Thanks


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