Which sentence is more suitable? Thanks!

I am composing a Thank you page text for our web site. The idea is to not simply let a visitor go after he sends the feedback via email form, but also suggest some other links to visit. I have two variants. The sentence I am not sure about is marked in green. If you have better than these two, I will appreciate if you share your opinion:

1) Thank you for your message!

Your email has successfully been sent. Please allow us 1 or 2 business days to get back to you.

Are you sure you’ve seen all you need on our web site?

Check out a few links.....

2) Thank you for your message!

Your email has successfully been sent to us. Please allow us 1 or 2 business days to get back to you.

Are you sure that you're ready to leave our site?
Check out a few links.....

Thank you in advance!