I have a THL W8 beyond, Chinese phone.
Specs here
works a treat, comes with spare battery, charger spare flip case etc etc. is only 16Gb (but takes an SD card too) and has 1g ram, but runs the mediatek turbo quad core processor and is nice and speedy. excellent screen too and a 13mp camera on the back. Bit of a S4 clone, but a good one.
Support from THL is not bad either, emailed an inquiry and got a response about 4 hours later!
Phone cost now is about £160.
Or you could go for the upgraded one, 32Gb and 2G Ram for an extra £30!
Here
Only downside I can find so far is that the only GPS tracking software that works is Runkeeper, but that’s more to do with mediatek chips and the way the other apps handle the GPS data.