hi zoeanne,
ok u think ah:
1) if you quit, will u wanna go thru the phase of looking for jobs, preparing for interviews, going for interviews?
2) can u live comfortably for abt 2 - 3 months, just in case you do not find a job. actually job market now is not bad. if you are picky of cos you will have your own problems else its quite ok one...
3) determine the real reason why you wanna leave in a nice manner, cos eventually once you send resumes out and have calls, everybody will ask u why you wanna leave, what is your last drawn, your expected, what you wanna do in a new job and your notice period.