I also hope I'm posting this is the right area. Please don't beat me to hard if I'm in the wrong area

My question is what is the best central location area in Dallas? Currently located in far north Dallas off the toll road and Frankford. I do like the are but I feel it is kinda far from downtown but I don't want to move to far or even worst a bad area for business. I was thinking maybe 635/Preston-colt or even in a condo by north park mall? Any sugestions and feed back would be of great help.
Kisses!