Generally speaking, if you use any kind of "free" points etc , the provider will charge the full brochure price with no discounts.
I booked a Cosmos holiday using Tesco vouchers and had to pay full price, it was fairly marginal wether I saved money or not.
On the main point, I agree with previous posts, make your decision and stay happy with it!
Although I confess I do check to see what has happened to the price afterwards
Is a holiday really about getting the absolute best deal, or is it about getting what you want at a price you are happy to pay?
Another thing to remember is, no matter how little you pay there will always be the "person" on the next sunbed who got it cheaper!
(don't you just hate 'em)