Hi justinsekar,
For sony, just strike it from your list. As it is a very complicated and problematic HTIBs available, coz its a in-built DVD player and AMPLIFIER model. Its paper specification may be well or it can sound good too for some one, who never heard the 5.1 sound. After some years or sooner the DVD player will show the big bizbang actions which you have not seen before like problems. After some services done for DVD player to work well and then the problem works very well repeatedly. Then, if you wish to connect a new DVD player to the sony AMPLIFIER, you cannot able connect it in the sony AMPLIFIER becoz it does not have any 5.1 analog inputs or any digital inputs or even a 2 channel stereo inputs to decode or receive any audio from the new DVD player or source palyer. And then your AMPLIFIER will also be useless to connect any external sources like DVD players or other source players. AND coming to the sony speakers its normally 3 ohms impedance speakers. You should not connect the sony speakers to the brand AVRs, bcoz most other brand AVRs support only from 4 ohms speakers to 8 ohms or 12 ohms only. So connecting the sony speakers will damage the other brand AVRs bcoz of lesser ohms, when used for very period. you landed here for the experts suggestions, so go for a better one.
For yamaha its like all are seperated. The AVR comes in the package YHT-195 is 5.1 channel a/v receiver. 5x110 watts rms at 8 ohms, 5x135 watts rms at 6 ohms, 5x150 watts rms at 4 ohms. Total Harmonic Distortion(THD) 20hz - 20khz is 0.06%. HDMI (2 inputs/1 outputs) 1080p compatible, Audio Digital inputs(optical-2/coaxial-1), weight-8kgs. The speakers all are 6 ohms impedance. So, its very easy to mixmatch with any brands AVR when you go for a upgrade. VFM go for a YHT-195. Its very good option for you as a bigginer.
From the specifications of the sony, the speakers rated impedance is 2.7 ohm or 3 ohms. It is not suggegted to connect the lesser rated impedance speakers to the AVR rated from 4 ohms to 8 ohms or 12 ohms, it will damage the AVR when used for long period by connecting the lesser rated impedance speakers. The speaker impedance specifications for the DAV-DZ150 model is 3.2 ohms.
Cant even YAMAHA RX-V363 should be compared to sony DAV-DZ series amplifiers, becoz yamaha AVR has way ahead compatibile and has enough power to handle a 300 watt Rms floorstanders. It has many features like speaker A/B or A+B options and many audio inputs and outputs for different types of source connectivity. Sony it should be a considered as a very bad entry level HTIBs in the market.
cheers.