There should only be one clipboard.
I'll use these to "read in" files:
xc < filename
And then in vim (faster than toggling paste mode): r ! xp
or r ! xpc # for CLIPBOARD buffer "+P
?It's also a double pinky keystroke with a shift required (on QWERTY). Really awkward to type.
Try ':0r ! xp'
It does pretty much roll off your fingers.
Clipboard selection gets copied to a clipboard application and is accessible as long as you don't overwrite it (or even then, if you have more sophisticated clipboard app).
As a multi system user with only one k/m input (windows/red hat), I love the differentiated buffer capability. It allows discrete usage of cntl x/c/v across systems and STILL allows me to manipulate c/p actions while multitasking.
Check yourself: http://tronche.com/gui/x/icccm/
1) Ctrl-alt-L: Give me a cursor at the end of all selected lines.
2) Select the line paces you want to paste using normal editor keyboard commands.
3) Ctrl-C
4) Go to the place in your lines where you want to paste (or click somewhere to get a new cursor and paste everything newline separated)
5) Ctrl-V
Scales to however many lines you want to do this to, with 'constant programmer time' ;-).
Actually, mine has five:
Three at the top (corresponding to the mouse buttons), generally used with the trackpoint.
Another two at the bottom (two-button mouse), used with the trackpad (which I've, of course, disabled in BIOS like any sane user would).