there'z really no benifit to having all of your gear the same brand. Each company has specialties. Technics makes good (duh) turntables, but not much else (headphones?)Pioneer makes good DJ CD players and mixers, Vestax - good turntables and mixers, Numark - good mixers, Stanton - carteridges.
Most of these companies make a full line of gear, but have certain things that they do best, and it's a better idea to assemble an all-star line, within your budget.