i have the router. its nice when i game and BT at the same time, however i also have the WRT54GS (moved to parents place) and saw linksys's own latest firmware had something similar to DLink's traffic priority management.
i love using gigabit connection and i hate to have too many routers and switches on my table, so i went with the dlink one. unlike the linksys sppedbooster router it doesnt work with my work's nortel VPN out of the box (had to assign work laptop a static IP and then open a few IPsec or whatnot ports on the router)
i had good experiences with linksys' wireless routers. try changing a few things on your router. tweak around with it, change the radio channel (everybody uses 6 by default so thats very busy if you have lots of neighbors in apt buildings), turn off WEP/WPA for a while and see if that still happening.