My suggestion is to stay close to the 635/75 area. It is about 20 minutes from DFW and Love Field. Downtown is only 15 minutes away.
Here are my top picks.
Westin Galleria
Hotel Palomar Dallas
Le Meridien Dallas Galleria
Hotel ZaZa (closer to downtown, but a fantastic hotel)
Good luck.
Originally Posted by makmak
The hotels you mentioned are great choices, but aren't what I'd normally associate with 75/635. Many of the hotels in the 75/635 area (also known as the Hi-5) tend to be low-rent and crawling with drug dealers and pimps.
The galleria area hotels are west of Hi-5, near the NDT and 635, while Palomar and ZaZa are more closely associated with uptown. Both are desirable areas of town.