Static Pages vs. PHP Get Pages

[sujith.it]

I know the thread title isnt very clear, but simply, my question is this:

I run a credit card, loan and insurance site and currently I have pages setup like this:

Cards/badcredit.php
Cards/goodcredit.php
Cards/Bad/pre-paid.php
Cards/rewards.php
Cards/Rewards/travel.php
etc.

Essentially they are real physical files that are the same as every other credit card page, except for the MySQL query is changed to grab different types of cards.

Is it alright instead, if I simply create a Cards.php and use a system like:
Cards.php?Category=BadCredit and then mask it with Htaccess? Will it affect my SEO, is it good for SEO(Provided I have a sitemap that links to each of these pages)? It definitely seems like a cleaner way to do this and I would like to switch over to remove the clutter and crap of having many different files that I have to edit everytime I make a change to the site..
Cool Icons

[Ideadom]

With htaccess mod rewrite you can have them the way u want and it will only help yr SEO. for the old not-seo-friendly links u can place redirects to the new locations to avoid duplicate content problem and not to lose their traffic.