I can relate to this, I had purchased new what I considered the bass of my dreams about 4 or 5 years ago - a Streamer Stage 1 5 string (£1700) - I'd had a 4 previously which was superb quality and sounded fantastic (should never have moved it on), the 5 in comparison was extremely heavy, sounded very dark and didn't cut through the mix at all well - highs/mids were simply lost!?
I persevered with it and would always start a gig with it - however 5 or 6 songs in and I always found myself reaching for my back up bass - a Squier Jazz Bass, by comparison this sounded amazing - even the guys in the band noticed my fills and commented how good the Squier sounded.
I still have it today and up until recently had always been my back up on stage - I recently sold a Marcus Miller 4 as again I was finding it would be lost in the mix and have since replaced it with a Geddy Lee Jazz - this I would say is on a par with the Squier - perhaps even marginally better.
I'd picked up the Squier used for £130 - so definitely consider it budget.