in all honesty it does depend how much you would like to spend. although i gather since there is going to be 8 of them, its best to keep costs down.
one such website sells their own brand of monitors, they are a knock off of the famous yamaha NS-10. check out http://www.studiospares.com/Studio-Monitors/Studiospares-SN10-Nearfield-Monitors-Pair/invt/248000
they are cheap, well built and sound decent. but these are passive, they are not active speakers, they need a amp to power them.
but, you can go for something else, obviously.
i would have a check of the m-audio range of monitors. they are durable, affordable, plus the cones are made out of kevlar [bullet proof], which makes them tough. plus if you ever getting in a fire fight you can probably strap them to your front and use them as a vest :)
they sound good too.
other than those 2, there are loads of different brands, but they do change on price, even if they are the same wattage etc.
but have a check on http://www.studiospares.com and have a look around, check prices and that.
hope this helps you…
