Welcome to the forums! I hope you have as much fun building computers as I do.
Couple things right off the bat:
First, the 2500 vs. 2550k. The 2500 is not unlocked, making overclocking difficult or impossible (the 'k' in the 2550k indicates it is unlocked and thus can be overclocked). Personally, I don't generally OC, so getting the 2500 is not a bad thing (especially if you don't want to OC either); HOWEVER, the 2550k is slightly faster (3.4 vs. 3.3) and it's only $17 more (in computer terms $17 is not "significant" difference as you imply in your comment). For me, I would go with the 2550k, but if you have budget constraints, you won't go wrong with the 2500.
Second, while we appreciate you hyperlinking your products, the links you provided don't work. Remember:
Everything starts with "[]" and ends "[/]" and you place "url=" for hyperlinking.
When you use the "url=" command, the hyperlink you use must be complete. For example, "url=www.maximumpc.com" You cannot abbreviate the address (which I think you did, because I see the "..." in your link). Also, whatever you put in the "[]" will not be displayed, so while it may look messy when your creating the link, it should look okay when you post it.
I'll use the wrong brackets ({})so I don't get a hyperlink, but here's what it should look like:
{url=www.maximumpc.com}Your Description HERE{/url}
Using this example, here's what it really looks like when you're done:
Your Description HEREYou can use the address as your description, but it isn't required; often, people use the name of the product.
So, right now, I can't tell what half the stuff your talking about is. Correct your links or post the products and I'm sure we'll be happy to help.