I don't know how I chanced upon Abhishek Raghuram. Probably heard people talking about in rasikas.org. I've been hooked ever since I started listening to him. I think he's an extremely intelligent musician who probably works really hard to make his voice do the things his mind wants to do. He seems to have borrowed the best of S.Kalyanaraman, Balamurali, TNS and others. His ideas seem to keep gushing out and I guess he has a hard time coming to a stop sometimes. There's a pretty good collection of his music on Sangeethapriya. I especially recommend his Sri Valli Devasenapathe, Needayaradha in Vasantabhairavi (the alapana is one of its kind), Seethamma Mayamma. Of course, there's his magnum opus Thodi at the Music Academy in 2010.
Here's a link to his Needayaradha