I looked the specifications of ur projector. It supports 720p and 1080i. I also noticed that it has support up to 1024x768. I don't understand why it can support 1080i which is 1920x1080.
Anyway because it doesn't support HDCP you can't use HDMI to DVI-D adaptor. As your projector has only an HD15(vga) input you must use either Mayflash's Vga box + component ps3 cables or use HD FURY + a dvi to hd15 adaptor. What to choose?
I suggest you use the Mayflash box. It's very cheap, it supports 480p, 720p, and 1080p/i and it's high quality. But if you want insane quality buy the HD Fury.
I don't think it will make many difference. I use mayflash vga box, and the picture is clear.