2009 - Rally Red Cabrio due to arrive in next month or so.
Have been researching and thinking. Appreciate feedback on any or all my planned additions. Thanks to those who responded on single posts. But I thought it made more sense to consolidate my info on one thread... Listed is my estimated cost, chime in if you know of a good deal or a good vendor...
Stripes- Like the dual diagonal racing stripes - $60 (Black)
Stripes looks good on the Smart (Design is up to you).

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Floor Mats - Like the Smart OEM - Rubber - $50
I will highly recommend floor mats.
Air Scoop - Like the Evil Twin Scoop in Black - $60
I have the scoop installed for a few month now and loving it.
Luggage Cover- Smart OEM - $150
Cover is worth the price. Easy to remove if you`ll need to transport large items.
First Aid Kit - Smart OEM - $215
I have mine assembled for the fraction of the cost.
Armrest - Like the Smart Madness one a bit more than Genius - $300
If you drive a lot, armrest is a very good addition to the smart.
Fuel Cover - Brabus - $85
Here is mine ($20)

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Cruise - Area 451 + Install - $500 + install
On my list of upgrades too.
Trailer Hitch - E trailer - $150 + Install
- Golf Bag Holder - $375
- Luggage Tray - $125
- Spare Tire Mount - $100
- Spare Tire with Cover - $100+?
(Will use class 1 hitch with attachment, based on need)
If you drive just by yourself, golf bag fits perfectly inside the car.
I am not sure about spare tire. In 20 years of driving I NEVER used a spare tire. I carry a jack, $5 tire repair kit and AAA card.
Audio- Will add removable (quick connect/disconnect) subwoofer box, not sure about radio upgrade. - ???
Radar Detector- Like a wired version that leave 12V plug free.
I do not have one in the Smart, but if you drive fast you might want to have one installed. Got pulled over few days ago, but talked my way out of the ticket.
Homelink- Not sure, suggestions? Want something with minimal install issues.
You can buy Homelink remote from ebay for about $30. Somebody posted DIY here few weeks ago. Here is the photo of one installed I found online.
I told you it was a laundry list... No desire for engine mods, ground effects, wheels, ect....
Thanks for any and all feedback... Vendors are welcome to reply as well...