Hey,
Have a look at the Linksys that I've bought from PCWorld, I've downloaded firmware for it, this essentially allows me to change just about everything on the router, including the power output:
http://www.pcworld.co.uk/martprd/sto...ory_oid=-24986
I see that your about to buy a router with a power output of 22mW,
Well, my Linksys router (see PCworld link above), produces a power output of upto 251mW MAX.
So you can change it to 100mW or 251 mW
Tell me what you think!