I bought my rack at
http://www.sportsrack.com/
$650.00 and it took me all of 45 minutes to assemble and mount. More cargo space, no rear carrier to swing open & close every time you access back of H2, no obstructed view ... we love it!
Only downside is that it reduces clearance if you intend to park in a standard garage.
Just make sure you place a towel between tire and body of H2 to protect paint and you can roll the tire right up to the rack.