System?

So I was looking at builds online for a friend of mine who wanted a pre-made system and he asked if Mac or PC was better. I of course wanted to just be opinionated and say PC but instead decided to go online and check prices and builds and what would be best suited for my friend. For Mac I built a mac pro with a 2.66 GHz Quad core processor, 3 GB of RAM, 640 GB HD, 512 MB graphic card, and 18x burner for $2,499.00. On Dells website 2.3 GHz Quad core processor, 6GB RAM, 640 GB HD, 1024 MB Graphic Card, and 16x burner for $769.00. After reviewing the options and prices I suggested that they get a PC cause they work perfect for artists usually a bit faster than Macs and there are usually more programs for artists out there as well. What system he uses is up to him as it is to you but for me personally if I can build a better system for less plus I am comfortable with the system I am sticking with it.