Need advise on Home Theater

  Find a good dealer there and let them help you. Make sure your center channel is voice matched to whatever towers you buy. In an ideal world, your surround speakers will also be voice matched. Any subwoofer brands available in Dubai?

Thanks for your guidance Scorpio, visited a couple of shops. There advise completely sales perspective. I Am planning to change all 5  Definitive Tech satellite speakers to TAGA tower.

In Definitive clarity is pretty good, because of broken Subwoofer and to feel sound in big speakers planning to go for tower speakers. Need your advice is it good to go for TAGA tower speakers (TAGA TAV-506 v.2 ) 

Yes, most commonly I found Polk, TAGA, Harman K, SVS. 
Other brands are available in selected few shops. But expensive compared to  Europe and US.