Question Time
What basses/amps have you tried and liked?
In an amp what is most important:
Lightweight (e.g. you live up 4 flights of stairs like me)
Space saving (e.g. you have a small car)
Would you prefer head and cab separate or together in a combo.
Separates can be much easier to upgrade but will usually cost you more in the short term.
How loud does it need to be?
At the moment it sounds like your amp is the weakest link so I would concentrate on upgrading that first IIRC there was a line6 300pro on here, they're fantastic amps (hugely underrated) but not light at around 90lbs
Good luck in your search and welcome to BC