I started with a pair of brand-new, 2005 ActionBent Tadpole trikes, but my GF of the time never took to them, so I sold them 8 months later for what I paid (minus shipping) and bought a new-to-me, 2000 Street Machine. I went on to ride that bike for the next 15 years.
I loved everything about the SM except the chain tube noise. I HATED that with a burning, seething passion!
I tried everything to make it better: Different tube materials, chains, lubes, no tubes, modified tubes, different idlers. Nothing worked.
A few years ago I bought a 2009 Bacchetta Giro-26 from my local non-profit LBS, but quickly found the "Heel Strike" potential too much for my comfort zone, and had a pair of 20" wheels built around my original hubs. Now it's a twitchy little beast, gives a bumpy ride (though possibly no bumpier than when it was a G-26) and has lost some of its top speed. And that's OK with me, as I have no desire to go 30mph on my local, and often crowded, multi-use path (MUP).