Advanced Parol and H1B visa travelling

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Hello

I am on currently H1B visa using AC21 portability based on I140 approval from previous employer. This is my 9 th year and H1B is expiring April 2010. My current employer is starting H1b renewal again. I do not have H1B visa stamp in my passport as I did not travel outside the USA for last 5 years.

Through my wife's I 485 filling I am beneficiary on that petition. I have applied for advanced parole for both of us to travel out of USA somewhere around March 2010.

My questions are follow:

1. Upon travel when I try to come back should I use this advanced parol or get a H1 visa stamp on my passport and make a entry based on H1 Visa?
2. If I use advanced parol to make an entry does it invalidate my H1 status? I heard somewhere that If I use advance parol to make an entry than I can no longer be on H1 visa. In my case advanced parol I am getting is based on I 485 benefits from wife's I485 case.
3. If making an entry on advance parol does not affect my H1 status, then should I still go to US embassy and get H1 visa stamp? Or it is no longer needed? Is it advisable not to have H1b stamp in my passport at all because I can use Advance Parol for internation travelling? The reason I am asking is because to get stamp in passport will require me to travel to embassy and consume my time from very limited time I am travelling.
4. What are the documents I need to carry while I travel if advance parol is advisable to be used at port of entry?
5. What are advantage/disadvantage of Advance Parol Vs H1b Visa for making an entry?
6. and Lastly, the things I need to keep in mind while at port of entry?

I know, I am asking too many questions. But to be honest, I am really nervous about this traveling as I have not travelled outside the US for last five years. And you know during these years many things must have been changed.

I really appreciate any advise.

Thanks

Sanjay