Your based in the UK yes. Ok if you want to race with this are these two motors BRCA legal, if yes toss a coin and go with whatever as they both look good.
I would suggest in buying a really good esc first and then getting a 10.5 motor. I do like this esc at the moment. Ok get one with a reverse. I am going for one of the below but doubt you would need one of these
http://www.hpiracing.co.uk/piw.php?partNo=101830
as well as the LRP flow which is listed most places. Unsure which to go with.