I will make a very "unbalanced" suggestion that in the end might shock you in performance.
The Fosi amp mentioned in another thread is a steal. You can even upgrade the power supply if your speakers need more power.
If you go with this approach you will have almost all of your budget to devote to speakers.
Speakers are hard to suggest as I do not know your preferences but one kit that would be guaranteed to please would be the Dayton Solstice designed by the late Jeff Bagby.
I thinks that combo would be hard to beat! Also, the Fosi enjoys 4 ohm loads so the match of these two pieces should be very good indeed.