Yes, I have the Hitb30 which does not have DTS, after listening to mine 3 people went out and bought the 40, this has DTS and a few more Watts, so the 45 is probably a slightly more powerful version.
Whatever its a good budget HC system, you should note that it lacks mid range ( hardly suprising given the speaker size ) so music is not all it could be.
It does take a good stab at all the effects and its crisp and clear on dialogue. Next best to this ( keeping the small size ) are the KEF eggs, but you would need an amp as well, AX620 is pretty good, but theres a lot of choice.
The Hitb set up can usually be bought for around 350 to 400 pounds.