|I concur with Curt on this one: if possible connect the two with an ethernet/cat-5 cable.|
It will be more stable and faster...
The use of "lan over mains" - i.e. homeplug adapters - would likely work OK; but if possible to run a cat-5cable directly then I'd go that route.
Depending on where you are on planet earth depends which brands of homeplug are available to you. In the UK (and that area 22mile and more off the east coast) one can buy Devolo units; they were the first to produce the kit and they work fine. Netgear, TPlink, make them too and I think D-link does as well.
Some the homeplug kit now includes usb connection (usb over lan..) too; but I have no personal experience with that.
I have no connection with Devolo - other than as a long term user of their early kit - all of which works well. So I naturally gravitate towards their product line as a consequence of my experience with their kit thus far. The TPLink kit seems to be well promoted int he UK at least by Maplins; and both Devolo and TPLink are in PCWorld.