I would say it's worth it, the TD04 is quite small which is great for spool time but runs out of puff at around 270ish. Bigger turbo and injectors is a good next step, might want to grab an STI top mount intercooler as well (or front mount if you want to go all in). Bigger turbo should see you over 300bhp, the limiting factor then becomes your gearbox as the 5 speed becomes a ticking time bomb over 350