Where should my next solo vacation be?

First question to answer, budget = $1100

I've been to the following places in my adult years... not many...

-St. Lucia (LOVED IT!)
-Las Vegas (Twice, once with a friend, second time solo)
-Cuba (Varadero) (With ex-gf)

I loved Las Vegas as a solo traveler, one of the best trips I've ever had.

So, long story short I came into some $ and paid off all of my consumer debt and was left over with a nice chunk of $ to save. I would love to go on another solo trip, probably not vegas this time as I did everything I wanted to do last time that I didn't get to do the first time. So I am more looking for a relaxing vacation on my own since I've been stressed to all hell with a few things lately. My friends father suggested a resort to me in Cayo Coco that was $875/week all in for July.

Any other suggestions? Not looking to break the bank, just want somewhere that is generally suggested by a lot of people.

Thanks for any and all suggestions