I have a Macbook Pro but I need a high-end desktop at least for the next few months. I also want to get the next generation MacPro and use it with Leopard Snow. As the new MacPro is expected to come out next January and I don't want to invest on FBDIM which may not be used in the next generation MacPro, I consider to buy the ThinkStation D10/S10. In terms of hardware, are they better than the MacPro? The D10 can be configured to have two Xeon 5400 up to 3.16GHz. As for the memory, it uses DDR2 (up to 32GB) It even has a larger case for future expansions (such as CPU upgrades). For details, see:
http://shop.lenovo.com/us/workstations/thinkstation/d10-s10
http://shop.lenovo.com/us/workstations/thinkstation/d10-s10