I agree, Heimdall are to me the best of the newer Nordost. Very neutral and proper presentation of the music. I have listened to all in this line, Tyr, Valhalla, Frey etc..Didn't like any of the other ones except for Frey, but they don't reprsent the value of Heimdall.
If it is romance you are looking for though, like someone mentioned earlier, tubes will satisfy that very well. When I first got into this hobby I would never have considered tubes. 10 years later, it is all I can sit in front of. All of it connected with Heimdall with much satisfaction.