I Need Help...Which Address Should I Use?

Hello Warriors,
I'm a newbie in IM (though I've learnt a lot about it for many years now- bought programs/products but never actually got to starting an online biz but now I'm ready to start one.)

However, I'm studying in the UK right now but my studies will be over this year. I also work and my employer (US Based) has an American office through which we get our Intl correspondences forward to us wherever we may be.

To add to that I'm a Nigerian and do have a business there as well.

MY QUESTION:
Which address should I use on my website/business correspondences for contact purposes -as I learnt you need to put a physical address on your site to boost confidence level in prospective customers, among others.

THE CONSTRAINTS:
1. If I use my UK address, this will change in a few months time. Is it okay to change the website's contact details after just a few months?

2. If I use the US address, will this be okay? Fact is, right now, I was relocated from there- transferred to Nigeria although my employer forwards all mails to us.

3. If I use the Nigerian address, we are not supported by Paypal- my paypal is UK and I look to using paypal for online payment processing.

4. Do I use any of the available virtual address providers to ensure a constant contact address is maintained?

I'm sorry for the long post- just needed to let you see the full picture.

Any suggestions will be appreciated.
Thanks for your time.