i dont think you can get a home theater set up that can satisfy you at the cost of 25K other than HTIB, going the separates way would only allow you to get a receiver and left and right speaker perhaps but is it considered a home theater set up? if you want to enjoy movie watching there must be a front, left and right and suround speakers and subwoofer but if you find just the front and center satisfying enough, then good for you as starter
Receiver - maybe there are decent ones at 10K brand new kahit mababang modelo lang, i wouldnt get old models especially yung matagal na talaga, may risk na sa sira, pag nangyari yun, lalong nakakapanghinayang ang pera.
Wharfedale 10.1 - around 5.5 to 6k yata
Wharfedale 10CS - around 4.5 to 5 yata
Wharfedale 10DFS - around 4.5K yata
US Audio subwoofer - alam ko merong 7K
if you add up the above more than 25K na wala pang dvd player