Two of my favorite vintage speakers are KLH 6's and Klipsch KG4's (w/crites tweeters). The KLH 6's have great bass and with tubes involved can sound like honey. The Klipsch have such nice clarity and vocals but can be slightly bright even with the upgraded tweets and tube amplification.
If I could somehow combine both I would be very close to not looking for another set of speakers. The big plus w/ both of these speakers are that they can be had fairly cheaply. The KLH's I paid $60 while the Klipsch I got for $200.