The closest equivalent on the GPUs for the D300 (same SP count, slight clock bump, less RAM) is the W7000, which goes for about $650/ea right now.
Part for part, the new Mac Pro is very well priced, but like others have mentioned you could make different decisions if you put together your own system (personally I'd rather have a single R9 290X for example, but I game more than I CAD/CAM).
Of course, the new Mac Pro is your only choice if OS X is something you need (discounting PITA to update hackintoshes).
Part for part, the new Mac Pro is very well priced, but like others have mentioned you could make different decisions if you put together your own system (personally I'd rather have a single R9 290X for example, but I game more than I CAD/CAM).
Of course, the new Mac Pro is your only choice if OS X is something you need (discounting PITA to update hackintoshes).