Which Laptop Should I Choose?

I've been looking for a new laptop and have usually opted for Toshiba models I've had several in the past and their reliability have been excellent, my last one has lasted six years. I've come across two systems that peak my interest and I'm having difficulty choosing.

One of the laptops is a Lenovo and since I have had no experience with Lenovo's consumer line I would first like to ask what are they like in terms of reliability? Will it be expected to last several years of usage?

The other laptop is of course a Toshiba however I'm unsure about it because people are complaining that the audio quality is awful. I will post specs and links to the two laptops I have considered below.
What I'm generally looking for is a system with long term reliability, good battery life (around 4-5 hours), good audio qulaity, and decent speed (system speed).

Lenovo Z50-70
http://shop.lenovo.com/...-customize

O/S - Windows 8.1
CPU - i3 4th gen 4010U 1.70Ghz
RAM - 6GB DDR3
15.6 1920x1080 display
Nvidia GeForce 820m 2Gb dedicated
1TB 5400rpm HDD
Dolby v2 audio

Toshiba C55-A-1UC
http://www.amazon.co.uk/...00HRUSSG4/

O/S - Windows 8.1
CPU - i3-4000m 2.4 GHz
RAM - 8GB DDR3
1TB 5400rpm HDD
Integrated Intel HD 4600 graphics
Stereo speakers with DTS audio

Go for lenovo