Hey, i'm thinking of getting one of these.

Im using a Roland Cube 30X at the mo', i play death metal to punk rock (Decapitated - Sum 41 kinda thing)

Is it worth getting this pedal to fiddle around to get a better sound out the Roland, or would i be better off getting the new amp?

Reason i'm asking is because of the price difference, ive got the money for the amp, but for me its a fair bit to spend so i'm wondering which ones more worth it.
"Swim in a lake of death, eaten by crocodiles!"

Jackson RR3
Epiphone Les Paul Custom
Stagg C 442
Randall RG100G3 plus combo
Roland Cube 30X
TS9 Tubescreamer
The Roland cube isnt a bad amp. Actually pretty nice one for it's value. Now depends on how much You want to spend.

New amp -> completely new tone.
EQ -> shapes the existing tone