Your choice is vast so why not set yourself some parameters. Do you want a 5 string version of what you have now? You say your playing a Guild, apart from the Pilot most of them are short scale and Ibanez now make a short scale 5 string which people on here say is good.
Do you want a variation on the classic P & Js, as well as Fender lots of others make them such as Lakland, Spector Coda, Schecter, ESP, to name but a few then there are some slight variations on the theme like the Gibson EB5 new for under£900, the Musicmans and G & Ls etc
Then perhaps you should ask yourself active of passive?
There are a lot of great active basses out there not least Ibanez, Spector Euros, Yamaha, Warwick, MTD , ACG and loads of smaller manufacturers.
Perhaps an afternoon in a specialist bass shop like Bass Direct of the Bass Lounge might be helpful in deciding what you like and more importantly what you don't like.
Good luck and happy hunting!