For these speakers, you don't need a 100WPC to effectively drive these. I would suggest a high quality tube integrated amp like a Manley Stingray or one by Audio Research.
tube monoblocks and preamp recommendations
I have recently acquired a set of Altec Model 19s. In my mind, these would be great with tube monoblocks and a preamp. I would like to keep modern conveniences in mind(remote, input for downloaded/streaming content). I value any advice thrown my way. Ideally, I would like to keep below $5,000 but understand I may have to pay more for something that is not integrated. Thanks all!