I'm glad I don't seem to suffer from SBAD like some people do!
After my Simpsons Duke 2 decided to fall apart I had 0 brushes, so I'm currently using a cheapo £3.89 boar bristle brush from Asda (Walmart UK) while I wait for my B&B Ebony/Finest to arrive. I put an offer in for a B&B Horn/Finest last night as someone was selling one on B&B, so fingers crossed I'll get that too and have a matching pair.
The boar bristle brush is acceptable temporarily though. It lathers really well but doesn't hold much lather so I need to re-lather from scratch each pass. It's also pretty scratchy compared to a silvertip but not bad at all for what it cost, it's going to be my travel brush.