My phone has recently decided it wants to retire so I am looking for a new reasonably priced phone. Max budget ￡160. I want something slightly better quality than my previous phone which was a very basic ￡40 Sony Ericsson, but not something ridiculously expensive

The 2 phones I am currently considering are the http://www.amazon.co.uk/Sony-Xperia-Sim-Free-Smartphone/dp/B007N1JTEM/ref=sr_1_1?s=electronics&ie=UTF8&qid=1351199298&sr=1-1 and thehttp://www.amazon.co.uk/Samsung-S5830-Galaxy-Free-Smartphone/dp/B004Q3R9H4/ref=sr_1_2?s=electronics&ie=UTF8&qid=1351201224&sr=1-2. Has anyone had any experience with these phones that they could share or with any other phone within my price limit that they could recommend?

Any help would be appreciated