I would get a nice integrated amp as the backbone of your system. Like a creek destiny or sim audio 5.3 or a krell 400ix then figure on a set of speakers that will work well with a 100 or so watts of solid state power like a Dynaudio x12 or Revel M20. Add a 500 range DA converter and your in budget.
I've had a lot of expensive cheap and mid priced systems and I have found that no matter the quality of the front end gear or speakers you can't get by with a cheap amp. A good integrated amp like the ones mentioned will work with a variety of speakers and can be left on so your system is ready to rock at any time. If you are more of the type who only likes to sit down and listen at certain times and it appeals you could consider tubes. I like to have my systems on all the time so tubes don't appeal to me. Ive had many tube amps and personally the sound wasn't worth the hassle.
You should be able to put together a fantastic system for 3k.
I've had a lot of expensive cheap and mid priced systems and I have found that no matter the quality of the front end gear or speakers you can't get by with a cheap amp. A good integrated amp like the ones mentioned will work with a variety of speakers and can be left on so your system is ready to rock at any time. If you are more of the type who only likes to sit down and listen at certain times and it appeals you could consider tubes. I like to have my systems on all the time so tubes don't appeal to me. Ive had many tube amps and personally the sound wasn't worth the hassle.
You should be able to put together a fantastic system for 3k.