[QUESTION] Is it worth it to upgrade my amp.

I currently own a GTX 100 modeller amp with a tele Single coil and an ibanez rg421. I can dial in somewhat…decent tones with the modeller, but they do come off a bit boxy.

I’ve agreed to perform at the end of year work picnic with a couple of Gojira covers. I’d love to gig and join a band and I have my eye on a used EVH 5150 6l6 with concentric knobs with 1270 aud. Would still have to get a cab. Do you think this would be worth the upgrade?