Valve preamps can be designed to be very clean, e.g. Hartke LH500, or very grungy like the aforementioned Orange. Not sure where the Spyder sits - but just because it has a valve pre doesn't mean it'll sound like an LB30.
I use an Orange Terror Bass myself, and warm it up even more with a pedal - I recommend the Bearfoot FX Blueberry, Catalinbread SFT, or Xotic Bass BB Preamp as my current favourites. Not a fan of the Sansamp stuff personally.
Other amp options I would look at are the TC Electronic Classic or RH series, Genz Benz Streamliner, Aguilar TH500, Markbass TTE and GK MB Fusion. But I would start with the Orange, cheapest, simplest and dirtiest of the lot!