Elephant are cheap but in my opinion only seem worth getting a cheap quote from in order to get a price match off someone else, 'Internet only' insurance seems dodgey to me especially when you have to fork out 60p a min on the phone if you want to call them! This in combination with the fact that the site was dreadfully slow didn't inspire me too much if I ever had to make a claim.
Don't worry too much about that, at 23 I the best price that I got for insurance was just over £1400 on an Elise 111s with no no-claims.
Make sure you let me know if you get a mega cheap quote for an S though as I'll only just be when mine arrives (assuming that it actually turns up this year!

)