Those (IO-6BLs) look similar to some outdoor speakers I purchased a couple of years ago from the Outdoor Speaker Depot, similar in specs, too.
Depending on what you want from your outdoor listening, there's almost as big of a difference in price range and options as there is with indoor setups. Most folks fall in the category where they just want some ambient music on an outdoor deck, screened in porch or backyard area, which is the group I fall into. Others want detailed accuracy and will go the extra mile with the outdoor subwoofers and multiple speaker locations where the listening area is rather broad and requires a larger speaker configuration addressing placement issues.
The FR down to 50Hz w/mainly music isn't necessarily too bad and considering how much bass is lost outdoors, which can obviously be different for every person and their environment, placing a priority on low end for outdoor listening might get a bit expensive. In addition to this, depending on how near or far your neighbors may be located, being limited in LF output isn't necessarily such a bad thing, assuming you don't want to start brawling with them any time soon.
With so many obstacles and shortcomings of outdoor listening, I succumbed to the realization that so long as I have some music that sounds relatively decent and can be heard where I want and does some justice to the music, that's good enough for me. As always, YMMV...

-TD
p.s., love the 'Monster' line in your sig...