Turns out the high pitch tone is a feature of the Ashdown amp, having to use my old behringer for now.
By recording in stereo I meant that the line out only used the right channel which meant recording onto a stereo track then splitting it to mono and deleting the left track which gets annoying after a few takes.
It's nice to hear something good about the lightsnake cable, I had considered it but was put off by a couple of bad reviews. Do they work with passive basses?
With regards to bass amp simulators I'm using a fantastic free VST called [url="http://tinyurl.com/22kgs5s"]Free Amp 3[/url], it's got some good presets and I'm starting to fiddle about to make my own.