I highly recommend the Mitshbishi Electic MJ-E152AF-H : I am very happy with it; leave it on AUTO 24/7 on a 50% target humidity level and it will switch on and off as needed. Reasonably quiet even when sleeping. Works well to keep indoor humidity levels at around 50% all year round. Obviously it switches itself on less during the summer when the A/C is on and dehumidifying, so it works well as a standalone solution. The only issue is emptying the tank which can be every day to 2 days. I have tried a hose connector, but cannot really find a gracious way of organising a hose route from the dehumidifier to the drain.
http://www.mitsubishi-ryoden.com.hk/...doc/ib/255.pdf
http://www.hkele.com.hk/uploadfile/p...6165626420.jpg
I paid HKD4280 from Ming Fung Hong Co Ltd at 50 Gilman Street, Sheung Wan in early 2015. When it comes to dehumifiers, you get-what-you-pay-for and it is generally best to have high-quality low-noise models that will last.
I also found it was helpful to have accurate hygrometers: I recommend the TFA 30.5026.01
http://ecx.images-amazon.com/images/...mL._SY355_.jpg
It seems to read exactly what the Mitshbishi Electic MJ-E152AF-H says; within reasonable variance of +/- a few %
Ambient humidity indoors makes a huge impact on overall ambiance / quality of life!