A pair of W90C's or W70C's should work well with that amp. Should be able to find a pair of either for well-under $500 with some looking. You could even go with early W90's or W70's if you're not planning on cranking the things (The early ones like I have are only rated for 30wpc, but I'm currently driving mine with a 39wpc Sansui 2000x). All these models LOVE tube power. If you're looking to do the warm, engaging, musical, tube-powered thing, these are a really-good choice (My W90's are phenomenal with tubes). And the Wharfedale W** and W*** models are designed to work well in the smaller rooms found in apartments, duplexes, etc., so even the big W90's will do fine in a fairly-small room (I have mine in a 14'x14' room, and they sound fantastic).
Even the W60's should be okay with that amp (and might be better for you if you need a smaller speaker (The W70's and W90's are kinda' big). Like the others, the W60's are excellent with jazz, classical, and blues, as well as '60's and early '70's R&B, funk, classic rock, etc. They have a very-rich sound with great mids (and also a nice upper-bass response... Not boomy at all... Low-bass is on the lean side, but you won't miss it unless you're listening to music that accentuates those ultra-low frequencies... The nice upper-bass really makes up for that).
You might also want to look into the W3 and W4 models. Sound-signature is similar to the original Airedale model, only smaller.