What about getting a tried and true entry level bass until you're more familiar with what sound you're looking for?
The Squire Vintage Modified comes to mind:
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http://bass-guitars.musiciansfriend.com/product/Squier-Vintage-Modified-Jazz-Bass?sku=519639
The Squire Vintage Modified comes to mind:
Invalid Link Removed
http://bass-guitars.musiciansfriend.com/product/Squier-Vintage-Modified-Jazz-Bass?sku=519639