I would encourafe you to be fearless and get an all tube integrated. Those speakers are practically crying out loud for true tube output power.
If you get a decent amp lets say a used Prima Luna I think you will be very very happy with the results. I seriously doubt that the "single tube in the window" hybrid amps will make the sound appreciably better than your current set up does. Tube power will open up your sound and give you a 3 dimensional image you wouldn't have anticipated. Tubes are not the big hassel people make them out to be and if you have little kids just use the tube cage. I would go all tube or stick with what you have.
If you get a decent amp lets say a used Prima Luna I think you will be very very happy with the results. I seriously doubt that the "single tube in the window" hybrid amps will make the sound appreciably better than your current set up does. Tube power will open up your sound and give you a 3 dimensional image you wouldn't have anticipated. Tubes are not the big hassel people make them out to be and if you have little kids just use the tube cage. I would go all tube or stick with what you have.