This may be a bit more than you asked for, but.......
If possible, try to make sure your room is acoustically treated before you audition studio monitors. For critical listening, this can mean the difference between an accurate determination in your overall sound, or not. Treating your room can be inexpensive, especially if you do-it-yourself. I posted a DIY tutorial on how to make your own treatments, with locally sourced materials which can (in turn) help local small businesses. It's worth checking out:
How to make a Bass Trap Acoustic Panel (Tutorial) - YouTube
In addition, if you are on a small budget, consider buying pre-owned monitors that someone else may have outgrown, or no longer need. That way, you may be able to get a really good deal on speakers that are already burned in, and that retain their value should you decide to sell them later. Good sources for pre-owned monitors include the Classifieds section at Gearslutz (
Gearslutz.com) I believe you must register to view the Classifieds on that particular forum. Ebay and Craigslist are other popular places to buy "pre-owned".
KRK monitors (especially pre-owned) can be a GREAT value. Some others to consider are: Dynaudio BM6a's, Mackie 824's, - if using a sub: Dynaudio BM5a's, Mackie 624's. There are many others, but these are monitors that I've used (among others) with my Axe II, and all of them have translated quite well. (see Phil O'Keefe's article on mix translation here:
Getting your mixes to translate... [Archive] - Avid Audio Forums
Lastly, getting to "know" your monitors is something you should expect to do over a period of time. Very few rooms are acoustically identical (neither are 2 different sets of ears), and as such your listening experience will likely be different from anyone else's. Get to know what your speakers do by taking a mix of your music and playing it on a number of different audio devices (car stereo, boom box, laptop, ear buds, etc).
Martin Walker discusses some things to consider when monitoring in this Sound on Sound article:
20 Tips On Monitoring
Best of luck!