The last Dlink router I had had an overheating issue and disconnection failures. It was a common occurrence with that model (don't ask which, I forget already).
My neighbor had signal strength problems with his Dlink and I switched him off to a Netgear router and he has had no issues.
Linksys, not so Mac friendly, but, they'll work.... I had one in the days of no wireless yet...
I have had two Buffalo routers as my last two, liked them both and only upgraded to take advantage of Wireless N technology.
Both the Netgear and Buffalo routers have great signal strength and imo are very reliable.
If you happen to find that your unhappy with your Linksys, possibly return it and look into a Netgear or Buffalo router, jmho. But, my hopes is that you find it functional and works to your needs.