I'm on an unmetered 100 Mbps line, bursting up to 300 Mbps from time to time. Just like you, I had a tough time finding consumer-grade hardware able to keep up with speeds > 30-50 Mbps. After going through most of what's on offer here in the EU, short of DIY routers, I ended up with D-Link's "Wireless N Gigabit router DIR-655". Believe it or not, but I have actually seen throughput close to 150 Mbps (using NAT) on the WAN while on this network.
Of course, YMMW, but my search ended with this piece of hardware.Of course, it's priced slightly higher than the average router, but IMHO it's worth it.
On a side note: I personally, had no luck what so ever using Linksys offerings, including the WRT54*. Most "premium" hardware platforms in the consumer sphere only offer throughput close to 30-40 or even 50 Mbps while on NAT.
Good luck. And enjoy the speeds you have been blessed with, son.