There's technological difference. LCD & Plasma tv's gives real theatrical effect compared to CRTs. But yes, a true flat CRT is not a reason for not investing on Home Theaters.
btw. nowadays, the trend is towards LED based LCD. Please pardon me, I really don't know more about this technology.

Brand really doesn't matter as long as all your pieces are choosen as per specs. In my opinion many people buy each component from the best brand for that component ! Like Denon AVR + Polk, Denon, Onkyo + JBL, KEF so and so.
Onkyo's HTiB series doesn't have any floorstanding speakers. Its a basic combo kinda series and works out well in budget. If you need floorstanding ones, you need to build : Pick your favorite receiver and onkyo speakers etc.. etc..
Among the models listed by you, I find that all are almost similar except for power ratings. All are wireless ready. All have rear floorstanding speakers except for Philips, which has both both front and rear floorstanding. Power wise, Panasonic seems to be a good choice as the subwoofer is almost double powerful than the satelites and fronts, which is really good.