Which laptop/netbook is best buy please?

Which laptop/netbook is best buy please?

Added (1). All are 15"

a. Lenovo 8GB RAM, 1TB HDD, Windows 8.1, AMD a6-6310 Quad Core APU with Radeon R4 Graphics.

b. Toshiba Windows 4GB RAM, 1TB HDD, Windows 8.1, Intel Core 15-5200 Processor (3M Cache,
2.2GHz Up To 2.7 GHz).

c. HP Windows 8.1, 4th Generation Intel Core i3-4005U Processor (3M Cache, 1.7 GHz).

Thank you.

Added (2). All these laptop/notebooks are around the $600AU mark (sale prices as end of tax year sales here). The laptop in use at present is HP, 8-9 years old, has had some minor repairs.

For my son; daily usage. He has quite a few software programs running which he uses a lot (backs up sufficiently on a WD My Passport 1GB). These are, to name a few, Movie Studio Platinum and latest Adobe Photoshop programs. Not into gaming as such, but he uses YouTube frequently too. We also run MS Office 10.

Lenovo i3 core processor g50 series

What's your budget and usage?

Always look for a SSD in your laptop or install one your self that will be the safest fastest computer I promise.