The AMD solution for a music PC hands down, Mahiruha. And no, as an old user of AMD processors and compatible motherboards, they dont have any heating issues as of now.
The AMD 785 chipset is amazing in its versatility and includes a fairly powerful onbaoard graphics solution. A processor such as the X2 550 BE would be right up your alley. With a Gigabyte motherboard, you could unlock all four cores of this processor. That is, in my opinion, an unbeatable solution when compared to comparable Intel solutions.
However, if you are looking for a pure musical application, you may not want to unlock the cores thereby reducing overall heat/noise factors within your cabinet.