I've used my old math teacher's 5680 and my friend's 8790. The 8790 was much more impressive to see (the pictures didn't do it justice, looks sleeker in person), and style-wise it had the 5680 beat in spades in my opinion. However, the 5680 was still quite sweet and the UXGA screen was awesome (although the 17" WSXGA was still the best LCD I've seen on a laptop so far). They both seemed pretty solid, although I will say the 5680 just seemed to be a solid rock of a machine.