Maybe a pair of Rogue M-150 monoblocks, I see there's a pair for sale now (no relation).
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Unless you have a tiny room you won't find much in the way of tube amps that will work with that speaker.
If you do the math, your 86 db number changes to 83 when you take into account the speaker is 4 ohms. This becomes even less if the speaker is lower impedance.
That means that in an average room, 200 watts is not going to play all that loud. If your specs on the speaker are correct, its impractical with tubes. A 200 watt tube amp for $2500 is quite a trick!