University choices

Hi!
I am applying to uni next year- so in 10 months. I've been consistently stuck between 6 universities, and I would like some help before I finalise my decisions- I do know I still have time but I want a handle on things. So I want to apply for engineering (under different names at different unis). I am a Scottish student, who got AAAAAAAA at National 5 and is predicted 5 A's at higher, I am planning to do 4 advanced Highers. So these universities are: Imperial College London Course: Mechanical engineering with nuclear engineering (this is a definite keep as it includes nuclear and currently my plans are to research (the propulsion systems in) nuclear submarines as a lecturer), Oxford Course: General engineering at Trinity, Bristol Course: Mechanical and electrical engineering (I think that this course is also a definite keep something draws me into the modules and I would be applying based off of 2 advanced highers so that would make it easier for me to get in), Strathclyde Course: Mechanical and electrical engineering with a year aboad (this is my only chance at an unconditional as they do not require advanced highers- this is more common in Scotland than England), Duhram Course: Mechanical engineering (they do start out as a general course) I REALLY liked this area and Manchester, I really like their engineering department but the area is worse. I REALLY want to do my PhD here. For some context- I would be eligible for contextual offers at Manchester, Duhram, Starthclyde and Imperial (but this does not lower grades). I do not want to consider other unis, just how do I narrow this down?

Ok so we have to break things down a little bit.
1) Firstly the PhD, in engineering it is not typical for PhDs to be lecturers, most PhD researchers might do some teaching but it would typically be supporting dissertations, projects or as a seminar assistant. Additionally it is really too soon to think about if a PhD is the path for you, this is something to start thinking about as you are in your 3rd year preparing for 4th year (engineering PhDs almost all have a masters). Research is a unique environment and PhDs are even more unique.
2) your subjects are a little bit interesting mechanical with nuclear or mechanical & electrical, it seems youre settled on mechanical but nuclear physics pulls really very differently to electrical science. If you’re are interested in engineering nuclear reactors or thermal engine propulsion systems id probably lean straight mechanical. If you’re interested in electrical science or more electrified systems then do the combined degree.
3) As for university selection: i think you’re looking at lots of good options but it might be better to approach it more personally centered, what type of environment do you want, what hobbies do you enjoy, what can you afford, is travel and geography important… this should help you identify more appealing options (all the universities you listed have excellent reputations anyway).

For the course choice I very much enjoy both. My favourite part of my current engineering class is operational amplifiers. I also like the breadth of being qualified in both, and I do not think its that hard to write both into a personal statement as one/two of my courses are general engineering anyway?