Looking for a HP EliteBook

Hi there,

I'm new to HP products. What I'm asking is: can somebody here give me a name of elite book that:

- Officially support windows XP and windows 7.
- No need latest generation but have 1st or 2nd core i5 is a plus.
- Have COM port. I worked with Cisco devices alot. This is a huge plus.
- Screen size: I prefer less than 15.4"
- Memory: DDR3

I think I'll find a used one cus new one/new series have no windows xp support and no com port.

Thank you all.

Looking for a HP EliteBook