Keep in mind that almost all post-graduate med courses require the GAMSAT, which is the UMAT on steroids and amphetamines. Either sit the UMAT and go undergrad, or start preparing for the GAMSAT early. Many people sit it multiple times.
GAMSAT sitter here. Sat in 2014 and will sit again in 2015. Missed narrowly on getting in.
The GAMSAT is like the UMAT on steroids, in that the skills are very similar and it's certainly not knowledge dominated. It's been said that you can't study for the GAMSAT or the UMAT, and that's true in...