Cubase LE 4 v Cubase 6

Hi, i currently have been using Cubase LE 4 for the last 10 months now and am starting to get the hang of it :)

Im sell taught at this stuff and am just wondering if i should pay $500 for the new Cubase 6

...im a guitarist with a home recording studio and just want to know if Cubase 6 is too much for me or am i ready for it?
i now the basics but thats about it.

I really like the sound of the AMP modeling VSTs

I'm not completely familiar with LE4 - but I believe there are quite a few differences, better instruments and effects and extra features in version 6 over LE4.

Difficult question to answer... I don't know if something would be overkill for you... but why not watch these free Cubase 6 overview videos to get a sense of some of the new features and see if it makes sense:
http://www.macprovideo.com/tutorial/cubase-6-quick-start

I'd highly recommend checking out the Cubase 6 102: Fundamentals tutorial too as once you learn how to get around Cubase:
http://www.macprovideo.com/tutorial/cubase6102-exploring-the-fundamentals

Hope this helps
R