Joined: May 2007
Posts: 3,798
Likes: 1
From: Highland Park, NJ, USA
Bikes: "Hildy", a Novara Randonee touring bike; a 16-speed Bike Friday Tikit; and a Specialized Stumpjumper frame-based built-up MTB, now serving as the kid-carrier, grocery-getter.
My Curve D3 works very well for my 2-train commute, and I'm quite happy with it. It's not a light bike, though. If you need to carry more than a backpack every day, though, take a look at a 20" bike.
I'd check out a Brompton if you can afford one and like a little bit of suspension. I didn't get one mostly because the one I tried didn't stay together well when folded. (They have an add-on that keeps it closed. I didn't know about that then.) They fold well, though, and are well made.