So I did it, as you can see form my signature. I ordered from Germany (Thomann) a lovely Squire Amber Jazz Bass (identical to this picture)

and I love it. It was decision made at the end of December, not a thought but a decision, and a month later order and arrived about a month ago. I have played with it nearly everyday, and with the help of Overlouds Mark Studio and some post processing from Sonar, found I love the sound I can get from it. I have approached it in a methodical way, playing scales (in three positions), learning to rake. It was quite intimidating at first, but it's becoming more an more intuitive. I have 3 songs that I base my practice on; Stand by me - focuses on moving the fingers around a fixed position, Come together - works on sliding up and down the neck, Good times - open strings and muting.
It's helping me re-think basslines, having relied on monosynths before. It will be interesting after the dust settles how I then produce mono synth basslines, and think about what exactly is a the bass range. I need to focus next on playing chord tones.
If you have ever had thoughts about learning a bass guitar, the answer is quite simple. Do it!