TripleXPrint

I have my old subscriber list and wanted to send them an email blast to introduce my new program. I have demos and live samples on my website. I have nearly 11,000 subscribers. The question I have is this:

Should I send out the email blast tonight (Friday) so prospective clients have the entire weekend to review what I offer or should I wait until start of business on Monday to send it out? I wanted to send it out tonight (Friday) but then again, I want the impulse buys. I want people to call me or sign up as soon as they receive the email. If I send it tonight, people may forget it about it by Monday.

If you have any experience with email marketing, what option would you suggest?

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Skype: Triplexprint