So, in my previous car (RX-7), I had a nice set of PIAA headlights that were just awesome. I want to buy some PIAA's for the Crossfire now, but I have a few questions that are keeping me a bit confused.

First of all, I see that the part numbers for the High and Low beams are both H7.

So, can I just buy two pairs of H7's and install them and the ones in the high beam location will be brighter, or do I need H7's with different wattages?

Speaking of watts... Looking at choices from PIAA, some of the bulbs are 55w, while others are 50w, both being H7. Does that matter? I saw some users have issues with the warning light coming on indicating a headlight burnt out due to HID's that run at very low wattages. Will 4w make a difference to worry about?

For the foglights, PIAA's are all 51w, is that the same as the stock bulbs?

Sorry if these are old questions, I browsed around a bit, but my questions are so newbie-like that I don't think they could be cleared up for me anywhere else lol.

Here are the pages I'm looking at if I'm confusing you:

For the H7:
http://www.piaa.com/Bulbs/Bulbs-H7.html

For the 9006:
http://www.piaa.com/Bulbs/Bulbs-9000.html

Also, any recommendations on which ones you would choose out of those options? (and I'm going to shop for a lower price, don't worry )