Re: question about studio moniters...
All monitors and speakers are colored to a degree. None of 'em are 'flat' and it doesn't matter if you're spending $200 or $200,000. What you'll generally find when you spend more money is that there are far less holes, peaks & valleys in the frequency response of the monitor which will make it easier to mix.
The room plays a HUGE part in this too, and without a well treated & tuned room even a $5K set of monitors is going to sound bad and your mixes will never translate to other environments.
There's no reason you can't mix on your stereo speakers as long as you know & trust them. Usually though, 'pro' monitors in addition to being more true are also more durable and can usually survive *accidents* like the bass player unplugging from the DI without telling you or the snare drum mic taking a direct hit. Some of the audiophile speakers while sounding great, will shred to pieces when stuff like that happens.
It's also pretty common to have a few sets of monitors in the studio, I do most of my work on two sets of monitors, one was a few grand and the other set was about $75. If a mix sounds good on both of those it'll sound good just about anywhere.