As the title says, i can not decide between upgrading my pc or my digital tablet.

My computer have 4gb of ram memory dd3 and a 1g graphic memory, but still it lags when i use certain brushes or in bigger resolutions, etc...

And for my tablet i have a wacom bamboo fun small.

Is really a big difference between a small bamboo and, for example a medium or large Intuos? or i really dont need a bigger tablet?

What do you think people?

Thanks in advance!