I would probably say a white 1.0-1.3ish gain is ideal. Lots of options, but I agree don't skimp...you have a great projector so compliment it.
Regards to the colors...darker is better, but WAF and black don't usually get along. Keep her happy (trust me).
Regards to the colors...darker is better, but WAF and black don't usually get along. Keep her happy (trust me).