It is better to go for YHT 299/2910 or Denon DHT X500 /x510 or Onkyo HTS 3500 tc.. Please make an audition and decide according to your hearing taste..
U will get a better sound and connectivuty options than the JBL htib bd300 ..
Since ure TV supports only 1 HDMI port and u dont want to use ure HT all the time then you will have to have separate connections coming the DTH and the HT (the drawback is that u wont get HT sound for the D2H as it will connect directly to the TV)
However I think you will need a switch like mentioned above