Tube amps are as subjective as anything in audio, which is extremely. The most important opinion is yours. IMHO it's more important to have an amp that works well with your speakers, and sounds good in your room than to try to match an amp to a music style. Every tube type and brand tend sound a bit different, and they also tend to vary from circuit to circuit, so absolutes are tough to come by. The preamp that you use will factor into the final sound as well. Either way, there's a lot to like about a good tube amp. Midrange clarity and depth galore.
With that said, I agree that a Dyna 70 is a nice starting point. Legendary amp for the price. The VTA version from tubes4hifi.com takes things a step further, and is just a wonderful sounding amp....it has some good American iron, a great circuit, and sells new for as little as $995 in kit form, or $1650 complete.