I teach Access in an FE college and the advantages are that generally you will be in a smaller group and get to know your lecturers better and they you. Some colleges will have articulation routes to various universities. Totally agree with the previous post about FE colleges being constantly F''''d over by the state with twonky experimentation, but despite that most of the lecturers really care that the students get a good deal - at least in the colleges I have worked in. There is variation in what different colleges provide however, and some are quite frankly crap - unqualified and underqualified and overworked staff who sometimes are only a text book chapter ahead of their students. Some colleges save money by employing as many newly qualified staff as possible, sometimes without teaching qualifications - although thats harder to get away with these days. Experienced lecturers are more expensive. Another issue is that in FE people may be teaching subject they are not qualified in - however that does not always mean you get a bad experience. Id say that in most cases from my experience Access students have a great experience - I still hear from students I taught who have since graduated so they cant have had such a bad time.
The best uni is not always a so called top uni - its the one that has the right course for you, is affordable in terms of living expenses and so on. Uni courses are either selecting or recruiting - selecting when they have more applicants than places and recruiting when its the other way round.
Students from our Access courses go to both old polys and red bricks.
Access students tend to go to unis close to the college where they have studied (older, often home responsibilities etc) so the relationship between the college and the unis can be important (if the uni staff rate the Access course and trust the references given this helps a lot).
Make sure you get help with your UCAS form, especially the personal statement (dont say your interests are drinking, socialising) - that can be the key to getting the place you want in addition to good research on the course you want. Attend uni open days and get a feel of the place before you settle on your choices.
And yes, learn to reference, dont plagarise, organise your stuff, take advantage of all the funding you can access and all the support you can access. Smile and say hi to your lecturers when you pass them in the corridor - sad but it means they will remember your name quickly and to be honest they take so much crap at work they love a smile and it will put you in their good books ! Good luck with your course.