Sorry to hop in late on this topic.
About 2 months ago, I got a quote of INR 40,500/- all inclusive for the Acer K330 from 2 dealers in Bangalore. One had it in stock & I purchased it without hesitation.
The dealers are Aum Technologies and Ninex IT Shop.
The reasons why I chose the Acer are:
1. It seems to be the only 500lm 720p capable LED projector with an audio out (stereo) port.
2. The focus does not drift like the other 500 lumen clones (Optoma/Viewsonic), due to good heat sink design.
3. 3D capable via a PC only (VGA/HDMI hack)
4. Access to the Service Menu to change LED settings + other stuff
5. Supports USB WiFi dongle (RT3070 chip only)
6. May also support ARC over HDMI (forgot if I tested this)
The only problem a few owners have reported is the signal drop issue when using HDMI.
This has been remedied by some by using a UPS to power the AVR/PJ/HDMI source. Others have disabled ARC, while some have had success disabling DeepColor/X.V. Color.
In the past 2 months that I've used mine, I've encountered this issue once, but did nothing, as it didn't reoccur again.
Hope this helps you'll make your decision.
