mbelle, welcome to the boards. There are a lot more considerations in deciding what kind of degree and licensure to get, including time and finances. If you have the time and money to do so, I'd definitely recommend going straight for your RN. If you're not sure, remember you can always get your LPN first and then decide whether or not to go back to school.
There are lots of threads asking this same question, so poke around in some of the different forums like LPN Corner, Student Nursing, Would You Recommend Nursing As a Career?, and Physician Office Nursing. Reading some of those threads might give you a better picture of the issues involved and help you make up your mind.
And yeah, I hate vomit too, but trust me, you're going to see some as a nurse, period. Can't get away from it.