What's your budget? The usual answers involve workstations like the Dell Precision line and Lenovo's P-series. There will always be some level of throttling if you want portability and power-efficiency. But if you want a desktop in a laptop chassis, battery be damned, there is Sager, Clevo, and their many ODMs/resellers: Origin PC (now under Corsair), Maingear, Eurocom, Digital Storm, Falcon Northewest, among others.
The advantage of these resellers is that they're more responsive to non- standard requests if you really know what you want and are willing to pay for it. In Origin's case, I remember a time where you could have a liquid cooled Xbox 360 or PS3 built right into your desktop computer! I don't know how much things have changed since then, but, with regards to purchasing monstrously powerful laptops, you have as much say as your wallet does.
The advantage of these resellers is that they're more responsive to non- standard requests if you really know what you want and are willing to pay for it. In Origin's case, I remember a time where you could have a liquid cooled Xbox 360 or PS3 built right into your desktop computer! I don't know how much things have changed since then, but, with regards to purchasing monstrously powerful laptops, you have as much say as your wallet does.