The Linksys access point should get better range than an AirPort Base Station, due to the twin antennas on the WAP11. I've been using one for about 18 months, and it's great.
One note, which applies to all wireless access points (including the ABS): if you can, place the access point on a high shelf. I got greatly improved range by putting mine on a shelf about 5 feet above the floor. Most impediments to the signal, like furniture, bookcases, appliances, etc., seem to be fairly low-about desk level or a bit higher. By putting your access point above that level, your signal should get through much more easily.
One note, which applies to all wireless access points (including the ABS): if you can, place the access point on a high shelf. I got greatly improved range by putting mine on a shelf about 5 feet above the floor. Most impediments to the signal, like furniture, bookcases, appliances, etc., seem to be fairly low-about desk level or a bit higher. By putting your access point above that level, your signal should get through much more easily.