Welcome
down 2 orth
Its for all people who like music (and surround sound), and appreciate setups, my system is no where near high end, but it is to improve my experience and allow me to enjoy my passions further than the default options.
Before jumping in buying speakers, how will you drive them? Do you have a receiver? Also what will they be used for, just surround or music as well?
Whilst it seems a good deal (JBL make some good stuff), the speakers are only 4 ohm, making it harder to drive so amp selection would have to be careful. It also makes no reference to their sensitivity (the higher this is the less power you need).
If it was me, I would be aiming for better speakers. If funding is tight, then you could buy speakers in stages, starting with front L and R, then add a centre, then get rears, with a sub being added at any time (also subs in packages are usually pretty poor and can be easily bettered by buying separate, e.g. svs or xtz, or BK if you were UK based). If you go this route though you must make sure the front speakers all match, i.e. are from the same range, otherwise they will unlikely match sound wise and could ruin your experience.
If you want to use them for stereo music, then I would definitely be looking at better front L and R speakers, these do not have to break the bank, as you can get good speakers pretty cheap these days, also you could consider second hand to get even more bang for your buck.
Assuming you are in the US, I would look at monoprice for some cheap gear that is getting great reviews, like their thx speakers and their subs are deemed to be bargains over here in the UK.
If you are US based, I would suggest having a look at avsforums (US based), if they are like avforums (UK based) they will give you plenty of help.
If you have any questions just ask.