Folding Bike Fever part 2

I have a habit of doing intense research of something I want before I decided to have it. And internet is a very important source of doing research and it has been for many things I have at this moment. And when I decided to have a folding bike, i go nowhere but digging in the vast resource internet has to offer. Two most important sources for me is Sepedaku (Indonesia bicycles forum) and Id-Foldingbike (Indonesia folding bike mailing list). Both offer important informations for me to choose what folding bike I will have. And right now they are 3 options in front of me, buy one of my friend's Dahon folding bike or buy a new Oyama folding bike. The other option is to buy 2nd hand Hasa F1 folding bike. They all have the same price.

My friend's Dahon actually is a streamlined Chinese Dahon KA062, a version of 2004 Dahon Vitesse D6. The other options is to buy a new Oyama folding bike (a Taiwanese brand) type Skyline Pro that some said it is a copy of Dahon Speed P8 (but with 7 speed). While Hasa F1 is a little bit out of reach because not many people own it and so it is hard find a used one on sale at a reasonable price.