Which cell phone to choose: Sony Ericsson Z525a or Nokia 6102i?

The battery of my crappy LG phone has died. I want to get a new phone. I have narrowed down my selection to Nokia 6102i and Sony Ericsson Z525a (I have ruled W300i out because I don't need a walkman phone). They are similar in terms of features, and I am more concerned about their drawbacks. It is said that there may be some problem with 6102i's speaker so that it is not easy to hear when not perfectly aligned to the ear; I would like to know if it is still the case now. Z525a looks sturdier than 6102i. It is said that the antenna case of 6102i can fall apart if one grab the antenna to take the phone out of the pocket (which unfortunately is something I am used to doing). It is said that the too-easy-to-hit PTT on on Z525a often gets into one's way (which I don't think is a feature I'll be using). Is there any other things to note on the two phones? Which one would you choose given similar prices?