Wireless router question?

Currently I use a WRT54G, and I've had it for years, I love it. But I find it falling short in one field and I have considered upgrading but no off the shelf linksys has the abilities I want. if anyone knows a model that does please let me know. I would like to staticly reserve specific IPs for specific MAC addresses. I had a Dlink years ago that did, but I am very partial to Linksys as it is a sub of cisco. I don't want to purchase a true Cisco wireless since I don't have those kinds of funds laying around. Please let me know if there is something out there.