Most of the comments on here already are pretty sound advice. If its your first tank though, i can relate to your anxiousness. We all went through it. Are you planning on going Fish only? Or are you planning on going right into corals? If fish only then you have a little wiggle room. If you are going straight into corals then i would definitely follow the advice above.
I recently read that one of the best ways to start a tank is to let it cycle not only for a month, but for 90-120 days with all equipment running aside from lights and with no fish or corals. That gives plenty of time for the live rock to mature and the beneficial bacteria to flourish. 120 days is pushing it though, lol. Thats 4 months staring at a dark empty tank. haha.
Looking back now, and being that i have been through about 8 tanks in the past 10 years i dont think waiting 3 months or so would be all that hard for me knowing now how important it is to not rush things. It will give you plenty of time to get your pumps and skimmers working, getting your aquascaping just right, etc.