Hi Davide, We have the HT-NT5 and are pretty happy with it. And whilst not familiar with those others you're considering abv, I think the NT5 (may?) have more features with higher/better specs, such as 'High Resolution' audio - Surround Sound Supported: DTS-ES, Dolby Pro Logic II, DTS 96/24, Dolby Digital, DTS, Dolby Digital Plus, Dolby TrueHD, DTS-HD, and Wi-Fi built-in, etc.
I know it's a little on the more pricey side, and lacking a true center channel (a very knowledgeable senior member here informed me the config is often referred to as a 'phantom center'), and only 400 watts, etc, but 3 months on....it's been great so far, for us, as our first external tv audio system. Although it seems like these days, one never knows how far, so far, will last.
Moreover, after adding the SRS-ZR5
wireless surrounds to the NT5, whilst stumbling our way thru a minor sync setting adjustment, we've been super pleased with the 4.1 [phantom 5.1] surround sound quality, hence beginning to really appreciate the immersive qualities of surround sound.
It's our first soundbar, so we're newbies to tv external audio, but just saying you may want to take a closer or second look at the NT5 vs. the others (ie- checkout the CNET - HT-NT5 review
); (at some retailers, $400 when bundled w/Sony tv).
More info at: Sony website - HT-NT5