Need advice on which med schools to apply to

My background:

Education - I have a BA in Psychology (3.2 GPA from Baylor University in Texas) and MSc in Clinical Neuroscience (B average from UCL Institute of Neurology)

UKCAT - my score is an 835 average (VR 770, QR 780, AR 900, DA 890) and Band 1 for SJ.

Work - Have worked in hospital since January 2011 as a Medical Secretary, Admin Assistant, Clinician's Assistant, have shadowed on a ward for a week, training to be a Health Care Assistant starting next month (including venepuncture training)

I've narrowed my choices down to 5 schools and cannot decide which to cut out.

KCL GEP - This is my #1 choice
Warwick GEP - Location isn't ideal, but it's the biggest programme so that might help
Newcastle GEP - Worst location, but most likely to get into the GEP
UEA 5Y - This is a back-up, decent location and I have a friend doing medicine there
Cardiff 5Y - Also a back-up, seems like a nice location, but I have no clue how competitive it is to get in

Should I go with 3 GEP/1 5Y or 2/2? Are any of those out of the question, or are any guarantees?

Thanks in advance for any help!