Thanks all ching's recommendation. How about Naim XS? But I am afraid the Naim must be used as one set. I tried Atoll in200 at their showroom. It's quite impressive, very powerful with their set up using Athomn. But I am not sure if it matches with Triangle. I also considered USA Amp before, but I am afraid USA Amp lack of details. Once again, Thanks all.
AV bypass is one issue... the other issue is, if i connect my speaker to 4310, then everytime I listen to music, i have to disconnect the speaker cable from 4310 and then reconnect to the 2-ch amp.... I am lazy... ha.... =P