What Should I Look for in a Long Range Wifi Adapter?

[Bmoe]

I'm looking to get a wifi adapter for a mag254 I ordered. I am going to need one with a good range because I plan on moving to a bigger location and may possibly have two floors. Need something that if my router was on the first floor (and assuming the router has a good wifi signal range), then my mag254 wifi adapter on the 2nd floor would be able to pick up the connection and stream fine. I know this is possible as my dad in law has a router locked inside a cabinet in the basement and I still got good signal on the main floor.

[Android Man]

I find this better to use,

http://www.ebay.ca/itm/COMFAST-Wireless-Repeater-300M-Network-Router-WiFi-Signal-Range-Extender-EU-Plug-/152000979448?hash=item2363f6e1f8:g:nUIAAOSw3ydV4XnM

Plug it in behind the tv you will never see it.
Plus has great wifi on it but you can plug your mag into it like i do...connection never lost.

[Marley]

I run nanosat cost around 35 dollars each but will worth it when setup right have very big house and this works the best for me but it not a repeater

[Bmoe]

I find this better to use,

http://www.ebay.ca/itm/COMFAST-Wireless-Repeater-300M-Network-Router-WiFi-Signal-Range-Extender-EU-Plug-/152000979448?hash=item2363f6e1f8:g:nUIAAOSw3ydV4XnM

Plug it in behind the tv you will never see it.
Plus has great wifi on it but you can plug your mag into it like i do...connection never lost.

I totally forgot that I'll have an extra router which has a repeater built-in. This extra router is my main one now. It was fairly cheap when I bought it ($10) and the range isn't all too good (has trouble penetrating walls). But when in range it does a pretty good job. I might just get an extender to use with both of the routers if the routers by themselves aren't good enough. I don't plan on running ethernet into an extender though. That being said, if my range extender is good then I guess my wifi adapter for the mag254 doesn't need a whole lot of range. The entire place I plan on moving too has square footage ranging from 1500-1900 spread among two floors so hopefully if I have to buy anything, I can get it for under $20.

I run nanosat cost around 35 dollars each but will worth it when setup right have very big house and this works the best for me but it not a repeater

Where could one purchase nanosat? I googled the term and saw pictures but not an official manufacturer. If they are significantly that good I wouldn't mind spending a little extra.