I would concur with the above poster - I would also recommend AGAINST doing any GS with Oxford as there are huge quantities of incorrect answers for the self assessment questions in the traning manuals.
Alex at Bristol is an honest chap and runs a clean ship - many of my colleagues and aviation peers originally distance learnt the ATPL with Bristol and I have heard no major complaints about them as of yet!
Also, you seem like a genuinely nice guy, great attitude, but DO ensure you learn as much about the business/economic side of this industry as you can, as you come across as a little malnourished in that department to me!
I wish you the best of luck with your endeavours,
Ad