Which teacher would YOU choose for a recommendation? (Long)

Hi all, I lurk on these boards but decided to post a question to see if any of you can offer me insight. I'm a college grad (B.A.) and I am currently taking my prereqs at a community college in order to apply to a *competitive* accelerated BSN program by March. I need two letters of recommendation and, although I plan on getting all A's and have on my exams/labs/assignments thus far, I really need STELLAR recommendations due to my less than stellar undergrad GPA (personal issues that will be explained via my statement). In liberal arts courses I feel like a teacher gets to know you better, hear your "voice" and what not, but in these science classes I feel like a lot of it can be more listening and quite cut and dry.. Based on my description of my teachers, which two would you ask for a rec? Thank in advance!

1) A&P 1 Lecture Instructor - PhD, sweet/nice, seems a little aloof..Lectures the whole class and seems either nervous or awkward when I ask questions, so minimal participation and only 3 graded assignments (exams).

2) A&P 1 Lab Instructor - PhD, seems like a hardass but runs her lab like its own class...Lots of assignments, encourages participation (I am a natural born participator lol) interacts with us more than lecture..Emphasis again on the hardass aspect, but I am leaning toward her... How do recs from lab instructors look?

3) Nutrition - Teacher has good sense of humor, seems cool, I am able to share my knowledge and participate more than other classes, there will be a paper so she will see my writing skills (which I am proud of)... I was leaning toward her for my second, but Nutrition isnt exactly a hardcore science class so this may not be good?

4) Developmental Psych..took this online over the summer..Although I never met the teacher, I submitted over 100 written assignments (Im serious lol) which included my research, theories, and opinions on psychological issues, etc.. I got A's on every single assignment, of which there were many. At times, I lean toward him because he has more of a sense of the inner workings of my thought process, but he has never met me and again this is a nonscience class.

5) Chemistry - PhD, expecting straight A's on all assignments..she has her "funny" moments but she is also stringent/anal and obnoxious at times, although I am kissing butt as much as possible given her tude.

I am also volunteering at a hospital-based crime victim treatment center as an advocate for rape/abuse victims, and at a nursing home..but the reco asks that it be professional/academic..I do work as a waitress and have been a valued and responsible employee for two years, but my manager is less educated (bad speller, even) and so I hesitate asking him, although he is a friend and would probably just ask me what to write...Should I include one professional and give him an outline?

Sorry for being so long winded..Given all the facts, what would you do? Should I tell the teachers now that I will be asking for one later or...? I hope I get some insight here and If I can help anyone else with opinions, let me know!

Elle