Absolutely the MT07.

My choice a few years ago was an ER6N or an XJ6N. I chose the XJ6N and was very happy. Right now I would choose an MT07 over that XJ6N to the MT is a clear winner.

I had an MT09 and loved it. Never rode an MT07 but lots of my friends have had them and loved them. Never heard a bad thing.

Just know the MT07 are very very attractive to be stolen. I once was threatened with an acid attack for my MT09 and I've heard they actually prefer the MT07 for wheelies and shit because it is a twin and it is lighter.

If you live in London, Birmingham, Coventry, Manchester or Bristol...get the er6n because it is less likely to be stolen.

If you live anywhere else, the MT07 is a much better bike.