Are you looking for specific information?
If you just want to get a solid router, I'd recommend D-Link or Linksys.
If you're wanting to do something like install Tomato
on your router, then check out the supported models/revisions.
There are ways to boost your signal, such as adding after-market antenna, or tweaking the power in the card/router, but I'd ask someone who's more familiar with it.
Do you know what chip your laptop came with? If not, could you list them model?
Hopefully someone can come along and move this to the Network Nook where it'd get better attention.
Oh, and congrats on making your first post in four years of lurking!