I think Pythagore has been very level-headed and up-front in this thread. He didn't care for the 990. Outlaw stood behind their return policy and he returned it. The only downside is related to his geographical location and that added to the cost of his 990 audition.
I'm not surprised that you love the Aragon preamp, Pythagore. When I added an Aragon amp to my system it was a revelation. I can only guess that their preamps are in the same class. If my bank account was in a bit better shape, I'd probably be trying to find a Stage One to compare to my Outlaw 950. Ever since getting their amp, I've lusted after one of their preamps.
I'd love to try out a 990 but I'm afraid I'd like it and it's just not in the cards at this time. Sigh.