I'm a neophyte when it comes to wireless networking, but here are a few things I've learned so far:
1. I think wireless signal strength in different rooms of a house is influenced more by the physical barriers (walls, appliances, doors, brick, floors, etc.) than by actual distance. Netgear makes a router called the
RangeMax that, when paired with a RangeMax
USB adapter on the receiving computer(s), supposedly offers up to 10X the normal coverage of 'standard' Wireless G. That should give you a large coverage area if a standard router isn't sufficient.
I can tell you from personal experience, however, that wireless signal strength will be severely weakened by multiple barriers even if the distance isn't that far. If the signal is just going thru a floor, or a wall or two, you'll probably be fine with a decent standard wireless router. But 2.4 GHz has problems going thru multiple barriers (particularly if the walls have aluminum/wire mesh in them like some older homes do). I tried to hook some friends up wirelessly recently and couldn't make it work because the signal had to go from one end of the house to the other (~ 40-50') and thru about 5 walls, around or thru a water heater and refrigerator, etc. There was nothing left of the signal by that time, even with the RangeMax setup. But walking out of the den into the hallway, which was almost as far (distance-wise) but with only two walls for the signal to go thru, I had 6 of 8 signal strength bars. :thumbsup:
2. There are signal amplifiers like
this that you can attach to some routers.
Here are some more range extenders. I personally would get one of these things before I'd try a firmware flash with a third party program, but that's your call.
3. You mention "some security feature." You definitely want to use
WPA encryption rather than standard WEP. WEP is easily broken by anyone who knows how; WPA is nearly impossible to break. Use a strong password when setting up the encryption and you'll be good to go.
I'm sure there are a number of good routers out there, and the only experience I have so far is with Netgear routers. FWIW, both of the ones I've worked with have been very easy to set up (and I didn't know much about wireless routers before working with them). And Circuit City couldn't have been nicer about letting me return the RangeMax when it didn't solve my friends' reception problem.
Good luck.