I also recommend you to hk harp services (
http://www.harp.hk/). I bought a Aida from them a few months ago and the quality is good.
I think they are the main distributor of Salvi Harp in HK.
They have a showroom in Wanchai and you can try different harp models before you actually make deicision to buy. The staff there is very helpful & professional.
Help this helps:)