Mouser offers a large selection also – comparable to Digikey – and seem to get reasonable reports from customers (I have never used them though). I buy most of my resistors and capacitors from JustRadios, with occasional purchase of capacitors and other parts from RadioDaze and AES. I used to buy some parts/tools from Active on Boundary before they shut up shop. I occasionally use Lee and Main Electronics, both located on Main St. in Vancouver, along with RP Electronics occasionally, now located on Rupert St. I also buy from UK suppliers from time to time for some semiconductors, tubes and other parts, eg. BA thread hardware. I buy tubes from several suppliers, though I tend to go to Roger Gould at vacuumtubes.biz as a first stop, sometimes Pacific and occasionally AES and others.