Looking for a new router

[drblah]

I am looking for a new router since my old Sitecom WL-306 ([url]http://www.sitecom.com/support-product/productid/659#drivers[/url]) is FUBAR.

My requirements are:

4 port gigabit Ethernet.
WI-FI G and N. A strong signal is preferred because it has to penetrate up to two brick walls, even though I live in a small apartment.
Advanced features like port forwarding.
Should be able to withstand heavy use. ie lots of connections.

I am currently looking at the Linksys E4200 ([url]http://www.smallnetbuilder.com/wireless/wireless-reviews/31402-cisco-linksys-e4200-maximum-performance-wireless-n-router-review-followup[/url]) but it seems a bit pricey, and I'm a bit wary about the signal strength without any external antennas.

Any recommendations/experiences would be appreciated.