My last tablet was a bamboo and that was £40, it lasted me 4 years. When I spilt water on it I could have upgraded but I didn't, I don't think the tools will improve you as an artist, they're not going to be -that- much better, and if you can't draw you're not going to draw with a better tablet.
I think if you want too, sure, but don't justify it because its "high end".