Suggest you look at the card comparison tool to the right of your post, I think you may struggle though to get a card that gives you the initial £15k you state is needed to get the whole balance onto one card. !
Don't try MBNA it's the same outfit and won't allow inter-card transfer acceptance.
Egg are a separate outfit below.
http://www.egg.com/visitor/0,,3_84106--View_1763,00.html