domain keyword names switched?

[duckxtales]

okay i'm about to buy a couple of domain names, but i want to make sure im correct. Right now the main keyword is taken:

www.keyword1keyword2.com

but i dont kno if i should get:

www.keyword2keyword1.com

is that a good idea? its for SEO purposes. i want to be ranked higher because of that. Also I'm playing with plural words since the singular one is taken. good or bad or doesnt matter?

[gpmgroup]

Best to use domains for branding rather than SEO.

If you have competitors 6 competitors with

bluewidgets
bluewidget
blue-widgets
blues-widgets
blueswidgets
blues-widget

why should anyone remember
widgetblues for all their blue widget supplies?

[saoi_jp]

bluewidgets
bluewidget
blue-widgets
blues-widgets
blueswidgets
blues-widget

Be "blugets"