Which Arduino is the Most Used by ibles Members ?

I want to purchase an Arduino probably from Jameco Electronics close to me.
There is some confusion on which revision R1, R2, R3 is the most
compatible to this community.  Most of the Unos cost between $30 and $40 US.
I use a PC with XP windows  later probably be getting a shield 8 pin.

Picture of Which Arduino is the Most Used by ibles Members ?
VinceJDJ5 years ago
I would say the Arduino Duemilanove is the most used by ibles members. You can buy the 8 pin shield for $15 from the Instructables Store.
iceng (author) 5 years ago
Thanks,
I'm going to buy a shield after I first get the one with 14 I/O pins.

There are three versions of the bigger 14 bit  I/O unit.
These boards are advertized as versions R1, R2 and R3 all called NEW.
Reading the site text the differences are scuttle.
Which version is the most advanced  ?

A