I've also had good luck with building cables with DH Labs bulk cable - both Power Plus and Red Wave. You can get 10% off just by signing up to their email list, but they often have sales for 25% or more off their bulk cable if you are patient.
I've experimented with a few different connectors from Furutech, Wattgate, Sonarquest and HifiKing. I think the Furutech and Wattgate connectors are worth the extra cost if you are using better quality cable. The Wattgate connectors, in particular, are easier to use with heavier gauge cable like the Red Wave (10 awg).
Some of the higher priced Furutech bulk cables are also excellent, but are more than you indicated you wanted to spend.
I've experimented with a few different connectors from Furutech, Wattgate, Sonarquest and HifiKing. I think the Furutech and Wattgate connectors are worth the extra cost if you are using better quality cable. The Wattgate connectors, in particular, are easier to use with heavier gauge cable like the Red Wave (10 awg).
Some of the higher priced Furutech bulk cables are also excellent, but are more than you indicated you wanted to spend.