Hello @chungjh,
My apologies for the late reply. I humbly suggest that you approach it from a feasibility POV first: Will an amp of this size and configuration really work for you? By looking at a class of amp vs. looking at a specific brand or model you can get yourself "into the ballpark" as it were. My thought on this would be to audition something in the tube/100wpc range to start. Once you've made the determination that it works to satisfactory sound levels
(I suspect it might.), then you can redirect from there. More power? Less power? Any favored brands? Price range? New vs used? It sounds like you've decided to keep the speakers. Now it's time to find something to drive them properly to your requirements. In closing, I'm not going to get on the "buy this brand!" bandwagon. IMHO too often people get too strident about brands, seeking validation for their choices. Listen carefully. Make notes. In your area of the country I would suspect there are many suppliers to choose from or one of the use market places will net you a nice amp. Choose what makes you smile.
Happy Listening!
