My mind, after working for over 23 years in the info security business, always tends to think of how the ne'er-do-wells can/will exploit simple things.
If you do decide to go with smitty'spen.works, please make sure you keep smittyspenworks.com. For one, you can place a redirect on the .com to your new .works and old customers will always find you. However, the main reason to keep your old .com is if the afore mentioned n-d-ws often look for recently expired/retired URLs to snatch up to use for nefarious deeds (think distribution of porn, malware, identity theft, etc.) and it will likely be your reputation as the previous owner that will suffer. I can't recall how many of these instances I've seen in my InfoSec career.
jpw