The Hello Reef kit isn't bad, though I think you can do a little better just building your own IM 15. For example, I'd strongly suggest using real live rock, and not the CaribSea "life rock" that comes with the Hello Reef kit.
But it really comes down to what livestock you hope to keep and how much you want to spend. Do you know what kind of tank you want yet? Are you working with nearly unlimited funds like some of the big shooters here, or more of a budget minded reefer like myself?
Good luck whichever way you go!