As of now, all signs indicate towards the 'Big Three' remaining with the Heat. But if Lebron was seriously looking then I think he should give the Suns a serious look. They just have all the ingredients to have a successful team minus a player of superstar status:
1) Good point guards in Dragic and Bledsoe (whom the Suns can sign for less than the max) signed to long term deals; young centers with potential to develop in Plumlee and Len; and versatile forwards in the Morris twins, PJ Tucker and Green. They just drafted Tyler Ennis, TJ Warren and Bogdanovic this year, young pieces in what is considered to be a deep draft.
2) Furthermore, the team also has a couple of first round picks in either the 2015 or 2016 draft in addition to their own.
3) It has already been posted that the Suns have enough cap room to sign two players to max contracts as it stand now. Lebron can play with whoever he wants without the player taking a paycut.
4) Lastly, Hornacek is considered to be a really good and innovative coach as well.
Other than the Cavs, I wonder which other team can provide Lebron this opportunity.