Need help and advice on ht setup

Hi, I need some help with setting up my home theater. I would use it to watch movies mainly. Music / FM 10%. I would even be happy with HTIB but am not sure what to look for. I have a 22x11 room and do not want to spend more than Rs.35K (India) / 500 Euro. I generally watch English movies with lot of focus on dialogues and am told this always comes from the center speaker. Since the distance from center speaker to seating area is quite a bit (about 20ft), I need something which will give me the required effect. I did check out Yamaha YHT 196 and Onkyo HTS 3400. But i really need some good advice as I can not figure out what will work as i am not tech savvy and auditions don't give a real case scenario. And also don't want to end up spending a bomb and not have what i need.