Best transistor from choices of same type, say 2n3906?

[Ashurbanipal]

When faced with several choices of transistors of the same type, say 2n3906, ranging in price from $0.10 to $0.50, which one should I order? Do the more expensive ones sound better?

Here's the search link at mouser if you want to see:
http://www.mouser.com/index.cfm?&handler=data.listcategory&D=*2n3906*&Ne=500&terms=2n3906&Ntt=*2n3906*&Dk=1&Ns=SField&N=571&crc=true
This particular example is for a sub-octave divider effect, but I have several other projects - fet buffer, synth filter - where there are similar ranges in choice.

[cd]

Go with the cheapest, as long as it has legs.  Unless you actually want SMD devices.