Figure out what you want. Look at SPS corals. Do you like the stony look, or are you a LPS kinda guy? I have the Red Sea 34g with stock lighting. I keep simple corals, and some fishies. The tank feels like it's just the right size. I wouldn't bother with the upgraded lighting kit; you can get the tank without it for $650 shipped with stand. Paying the $600 more for better lights is a waste when you can get an entire tank setup from JBJ for that price.
If you want HQI lighting get the JBJ HQI 28g. You sacrifice a few gallons and some thickness in glass (I've read a few stories on our nano forums of the JBJ shattering- none of that with the RSM that I've read though.)