Thanks for the reply, and for the recommendations. You're right that I do want the finished look, I want it to look as much like a regular switch as possible.
Also, I would prefer the decora style switch, so I was looking on Smarthome, but am just overwhelmed with the different products available. I don't even know what to look for specifically. Now I know how other people feel when I try explaining anything computer related to them...
If you don't mind, could you possibly recommend (or point me in the right direction of) some decora transmitter and receiver switches from smarthome or other websites? (Also good to note I guess is that I'm Canadian, so if there are Canadian sites, that would help too).
If you are looking to coordinate "styles" you should probably stick with one supplier. The X10 decora switches are single contact - push the bottom of the paddle once for on, push the bottom a second time for off.
Smarthome and leviton decora switches are "true rocker" or two contact switches - push the top of the paddle for on, bottom for off.
While you could save some money by using an X10 switch at your stair location, it may be confusing for your family mixing these different styles.
Focusing on the Smarthome Insteon line, there are two "levels" of switches offered - Icon and Switchlinc. The Icon line is somewhat less expensive due to it's fewer features. These switches are transmitter/receivers so you can use the same units at the load location (top of the stairs) and at the remote location in your basement.
Your choice will depend on the type of bulb you are activating. If you are using (or ever plan to use) Compact Fluorescents, you want a relay Switch (non-dimming). For this application I would recommend the Icon 2876 (there isn't a lot of difference in the relay units):
Icon 2876 Relay SwitchIf you are planning on using the switches with Incandescent bulbs only, a dimming switch might be appropriate. Here the choice between the Icon and Switchlinc line comes down to price and personal preference. The following link is for a Icon dimmer (300W) and shows a comparison to it's Switchlinc brother:
Icon 2876 DimmerFor your second location in the basement, I'd recommend using the same style switch (relay or dimmer). If you are planning on "expanding" your system in the future, you could also use a 2486 KeypadLinc as the transmitter. This would allow remote activation of up to 8 different "scenes".
One important note on the above - All of the Smarthome units require bot a hot and a neutral (white) connection. If you don't have a neutral wire available in your switch box, we'll need to look at other alternatives.
Finally, the Smarthome units are Insteon with backward compatibility to X10 communication. Unfortunately, the units use "address capture" to program their X10 base address (no code wheels). This means you would need another controller to program the units initially (maxi controller or similar).
If you instead select the Insteon communication mode between the switches, things become a bit easier. The "linking" between the two units can be done at the switches themselves with not additional controller.
In either case, try to put both units on the same electrical phase to ensure good communication. If this is not possible you may require additional hardware to "couple" the phases (X10 phase coupler or Insteon Accespoint(s)).
Hope that's not too confusing,
Boiler