how big is your room ? how far away from the walls and corners are the speakers going to be mounted ? what shape is the room ? what listening levels are you planning to monitor on ?

no point getting speakers that do 18hz sub bass @ -3db when your room is 8ft x 8ft and u have the speakers pushed right up into the corners as your bass levels will be about +6db higher by the time it reaches your ears thanks to room acoustics and standing waves. same as its no point getting a speaker that rolls off at 80hz to listen in a large room etc.

u cant just say "are speaker X better than speaker Y?" , the only way to find out is by getting a nice dealer who will let you try a few different monitors and spending a couple of days with each one.

in 1997 i went thru about 8 different pairs of hifi speakers in 6 weeks to get a perfect sound in my living room , its gonna be the same with monitors in your studio .... suck it and see :)

ps , perfect speaker placement tips .
divide the room into an imaginary grid of 13 x 9 , put the speakers where those imaginary lines cross , should have tweaters at ear height and at least 2 ft from side walls and 1 ft from rear walls (depending on speaker) but definately NOT placed in corners of the room. angle them slightly towards the listening position,
play a mono vocal track (put mixer into mono mode) and sit and close your eyes - the voice should sound like its comming from a small point source dead centre in the middle of the 2 speakers , if its not then adjust the angle in a bit more until its the smallest you can make it.
when you have done that - play a track from a cd on a good quality cd player or something and prepare to be blown away (i use roger waters - amused to death as its recorded in Q-sound)

another good way is to buy this the XLO reference recordings - test and burn in cd :)