Have you read the (really long) thread on the Lightspeed? Plenty of amps are recommended in there. The sense I get is that it will work with many, many amps, but George recommends an input impedance of no less than 48kohms and input sensitivity no more than 2v, although several people have reported great results even when straying from these guidelines. It's more common for tube amps to have that high of an input impedance, so that's what seems most often recommended.
Here's a Jolida that fits the bill. Of course, your other components, etc. enter into it.
Here's a Jolida that fits the bill. Of course, your other components, etc. enter into it.