Which tube int. amp to pair with Spendor S3/5

I've been using my S3/5's with a little Creek 4330R for a while now, but I think it's time to go with tubes. I've been thinking about these 2:

PrimaLuna Prologue One
Jolida 302B

I've had my eye on the Jolida for a while now, but just recently heard about the PrimaLuna. They both are EL-34 based giving the midrange that I crave. It seems the Prima may have better build quality, and assembly....but I am not sure the Prima's 35W can equal the 302B's 50W. The spendors are very inefficient at 84dB, but I heard their load is quite favorable with tube amps.

I don't know, if 35W is enough for the S3/5 then I might just have to go for the PrimaLuna, or should I stick with the tried-and-true 302B's? What are your thoughts on these amps?