Looking for a 2nd hand laptop for Linux

[clv101]

10 year MacBook user, looking to move to Linux (as no way am I paying for a newish MBP and prefer Linux these days). I'm really after a 'solid' 2nd hand laptop basic spec something like this:

Quad core i7 ~2.5GHz
16 GB
~15" 1680 x 1050 display
USB3
Decent battery

What makes and models should I be looking for? Hardware wise I'm after something like the non-retina MacBook Pro, with no Linux issues.

 

[FatRakoon]

I have found, that HP Laptops have always been well happy to throw linux onto.

My Previous Linux Laptop was a HP DV6, but my main Linux Laptop right now, is an ASUS ROG

Both have proven to be flawless with Linux.

 

[Hades]

ThinkPad T430 or T530?