I had my 03RM250 done by MX-Tech. Definately worth it. Almost every one will tell you the best performance mod you can do for your bike is the suspension.
Before, I had problems with harshness in the small stuff and bottoming out in the big stuff. I could turn my adjusters 4 clicks and barely feel the difference. After, my suspension is plush, reactive, with great bottoming resistance. Now I can tell the difference between one and two clicks.
If you just get send in your forks and shock you will pay in the neighborhood of $800-$850. Sure the quoted service may be less, but you have to count on a few internals; seal, shims, o-rings and clips, being changed due to wear.
Did they do good fast work? Yes.
Am I happy with my suspension now? Yes.
Would I use them again? Yes.
What will the first mod I do when I buy a 4-stroke? Suspension
Hope this helps, Steve.