lol well if you have to do it by jul 27, then you will be in heat no matter where you go sadly:(
new orleans is very very fun, specially in summer ... not as crowded and you can really explore, and its really recovering nicely from katrina (french quarter is anyway, the rest is still pretty bad off) but it would be good to put some tourism money into the city:)
** also puetro vallarta has alot more than just a beach:) they have jungle tours, zip line tours, museums, ruins ... and of course just lounging in tropical paradise:)
puerto vallarta is awesome
... cancun not so much specially in summer, its full of just graduated fresh out of high school kids getting drunk lol not so fun.
Orlando is ok... if you are into disney, if not then its a living hell haha ... trust me on that one
but if you like disney and that stuff then its a blast, everyone should do disney and universal once in their lives and if you can get someone else to pay then take it!!! cuz that is no cheapo vacation lol
vegas and reno in my opinion are kinda over kill ... enless ur mega rich they are no fun.
Los angeles is cool ... hollywood... beverly hills... pretty fun:)