WHY ARE THERE NO SCIENTISTS AROUND ME IN REAL LIFE TO ASK THESE QUESTIONS
Firstly, here's the stats:
Undergrad Institution: one of the top University in UK (UK undergrad lasts 3 years, not 4!) Major(s): Biochemistry GPA in Major: High 2i ~ 1st (which is around 3.5~4.0 US standard. I've heard however that the conversion differs with undergrad uni?) Position in Class: (No numbers needed, but are you top? near top? average? struggling?) Type of Student: (Domestic/International, male/female, minority?) GRE Scores: QR 170, VR 165, AW 5 Research Experience: 1 month last summer, 10 weeks this summer.
My dilemma lies in my lack of research experience. I have done the maximum I could during Uni, as we cannot work during school in the UK (which I have read that many US undergrads do!). I feel however that I am comfortable working alone, and together as a team in the lab. If i apply this year, this is all the experience I will have. If I apply next year, I will be able to include my thesis research (which lasts for about 8 weeks), as well as another summer project (maybe).
Also, if I apply next year, I will be able to get a LOR from my thesis research PI. I have 2 LORs that I know will be strong, or near strong.
1st LOR: from my academic advisor, who will be able to vouch for my exponentially increasing grades as well as positive comments from my small-group supervisors/tutors (they basically support our learning by going over lecture materials and our questions in really small groups, often 2-3 students per supervisor every week for every module)
2nd LOR: PI from my lab this summer. Though I only met him a couple times over the summer, I think we got along superbly well for the number of times we were able to sit together and talk. He also complimented me many, many times on my potential as a researcher, so I think this LOR could be great.
3rd LOR: THIS IS THE PROBLEM!! I've just emailed the PI from last summer whom I worked with for one month and saw a total of 5 times. We barely talked. He was also extremely moody when I worked (He and one of his grad students were in a feud resulting in the grad student quitting!). However, if I wait till next year, i can replace this one with my thesis PI, who I shall try to get along with and get to know better! He also will be closer to the field I want to work in.
tl:dr - Applying next year means more experience (by a project or two) as well as a stronger LOR. Is it not logical to apply next year, or will I be able to overcome my one mediocre LOR and slightly lacking experience with other elements of the application like the SOP? What tier schools could I aim for this year, and how would that differ next year?