Amp choice for Harbeth (SHL5)

Hi,
I recently purchased the SHL5s. I would like to know what kind of amp you are using with them. 

I am NOT looking for an integrated amp although I know LFD and few other integrated amps are recommended. The only reason is I recently purchased an passive pre.

In this short time having them, what I found out although SHL5 plays good with all the amps/different wattage I have tried (Class D & T, older SS Marantz), they are better with 100wpc plus amp. To me they want that reserved power. 

I would like to take these superp speakers to another level with "that" amp. 

I have never owned tube amps. I would like to try maybe the VAC PA100/100 (can't afford newer models) or something in this $1500 price range but not less than 80wpc in 8 ohms. I am little scared of using/dealing with tubes but don't want to hide anymore. 

Please share your amp suggestions with me. 

Thanks.