What's up everyone?

Okay, so I am having a hard time choosing between those two phones nowadays, since I am going to have to buy one before Saturday. I have two options, either the HP iPAQ hw6515 or the Sony Ericsson P990. I've never worked on any of those brands before, used HP in laptops only and was the worst journey ever. Anyhow, I already have a Nokia N81 8GB but I want to buy one of those as an extra mobile phone.

Note: I am going to buy a WiFi SD Card for the HP since it doesn't have an integrated, built-in WiFi.

For Specifications:

HP iPAQ hw6515 Specifications HERE

Sony Ericsson P990 Specifications HERE

Thanks for your time every one and please give the reason why you'd choose one of them.