Like any tool it's a case of what you want to use it for. You say you play bass so are you expecting to record and compose with your laptop?
And if you haven't got a good bass yet, then can you live without the laptop? If buying anything stops or compromises you from following your primary desire (being a musician?) then you should think why you're buying it. There are plenty of good music software packages on PCs and so having a cheaper PC laptop and a bass may be a better combination.