I bought the regular Tbird when faced with the same question this past summer. Here's my reasoning: I wanted to stretch out the enjoyment of this bike as long as possible!
What I didn't like about the regular Tbird compared to the Storm were small things ... too much chrome for my taste, single weak chrome headlight, and its 100cc less than the Storm.
So, I bought it! Why? Because...
1) Its an incredible bike. The little things I don't like are insignificant.
2) It gives me small projects to do along the way in the winter time. I'm not a mechanic, so de-chroming a bike is a great past time. I've powdercoated a bunch of my chrome black, painted some, Plasti-Dipped some ... and its looking much better
I powdercoated the headlight black, installed an aftermarket PIAA bulb and installed my own Motolights from motolight.com. I learned a lot and now have superior lighting to the Storm.
Had I bought a matte black Storm, I would have had nothing to do to it!
3) It was cheaper than the Storm. Enough said.
4) I have great upgrades to look forward to. I'm ordering short TORS this week, and next year I plan on getting the BB Kit.
I like having things to look forward to - it extends the enjoyment of my experience. In the past when I've bought what I thought was the 'perfect' bike, I was always disappointed ... because, duh, there ain't no such thing. Much better to buy a bike that you can make your own.
Its taken me around 40 years, but here's what I have learned: Personalization provides much more satisfaction than trying to purchase ready-made 'perfection'.
Good luck with your decision!