What to do when looking for a domain based on a keyword?

I was wondering what you guys and girls out there do when looking for domains based on your keywords? I've found a really nice keyword that I want to use in a general domain that I already own for this particular niche but I am unsure if this is the right choice as the .org and .net extensions of the keyword are available. I'm worried that if I just use the keywords on the general domain, someone might come by with an exact keyword domain and rank higher than me. I could buy these but then again I don't want to be wasting money.

Example:

Let's say I'm in the football niche and I own FootballZone.com where I sell all sorts of products related to football. I then find an amazing keyword: "buy men football shirts online" which gets a huge amount of exact local searches. I check the domain availability and the .org and .net extensions are available but I would prefer to add a page to my main site FootballZone.com and rank this domain for the keyword.

What's the better option?

keyword domain is probably best but its really up to both page contents and anchor backlinks but if both are equal then the keyword domain will (from what i learnt) rank better than adding a page to the ....com/(keyword) even if the domain site is only weeks/month old

keyword domain. particularly for the long run. as long as you make a nominal effort to get it ranked, it should always stay in the top 3.

exact match domains will always be better, but do you really want to create 100 domains for each keyword? In my opinion, building up the strength of your domain will help inner pages rank better with less work.

Choose the best keyword and use that as an exact match domain then create pages properly SEO'd and backlinked for the other keywords.

Just my 2c.

(double post)

Exact Domain Matching = 75% of SEO.

You get a HUGE Authority boost by having the exact keywords in your domain, and this is why I recommend not wasting time on a site unless you have the exact keywords in the domain.

Do remember that if your keyword is, ex. moneymaking, and that keyword domain is taken, you can still get something like moneymaking2.com or moneymakingfast.net , etc.

But make sure you have the keywords in your domain, it's the next best thing to having an exact keyword domain match.

EMDs work the best.... How about having the EMD point to your website?