I currently have an Aleph 3 driving ProAc 1scs and ProAC 2.5s. The combination sounds very good with the 1sc and even better with the 2.5s. My room is about 12x15 and I listen mostly to Jazz so I don't drive them to very high levels, I just concentrate on the detail of the music. I am using a VTL 2.5 tube preamp and the match is great. The Aleph is a great amp, one of the best I have heard. If your room is small and you don't require your clothes to flap while listening the Aleph 3 would be fine, if you have the cash, go for the Aleph 5 or look into getting the BAT VK200 which is about same price in the used market. The BAt is also excellent. I also run this amp in another system and it has all of the qualities of the PASS, plus.
Good Luck buty with either you are on the right track
Good Luck buty with either you are on the right track