A second rec for ghd. I've had mine for 4 years and love it. Before that I too had a chi but didn't like it much. I became CG this summer and haven't touched my flat iron since but before that I was a flat iron junkie! I've bought over 20 flat irons and only stopped after I bought the ghd because it really is that awesome!
The new ones might be different but just FYI, mine doesn't have different heat settings.
Watch out for fakes - I bought one on eBa and it turned out to be fake. I know only because my sister-in-law had one that's original from London and I compared it to that and the one I bought on eBay was fake. So when I was visiting London I bought mine from there.