28 is not old unless you intend to apply to HBS and Stanford. Also, as long as you can explain why an MBA makes sense for you at this stage of your career, it should be fine.
For tech, business schools in universities with great engineering programs are considered the best. Thats why you'll probably see that Stanford, Sloan, Haas, Ross, Duke, Johnson and Austin-McCombs are good for tech and a lot of tech firms recruit from these schools. Tuck is up there with these schools too for tech. For Strategy, almost any top 20 program will be fine.
Try looking at the employment reports and see if they break up the % of graduates who accepted offers from tech firms.