K04-064 on a 20vt 1.8 4x4 Octavia (2005 mod)

Hi everybody,I am a newbie here on this site and I have a couple of questions because as I see most of you really know things about 20vt's. I recently replaced my stock turbo with a k04-064,I have also replaced the injectors-intercooler-exaust-fuel pump-downpipe-air intake manifold,did a custom remap...and some other stuff to make the car work right. And it does work perfectly beeing really fast and powerfull. The thing is that I stil have stock internals on the engine,and the question is: has anybody here made the same mods with a k04-064 on a stock engine? Will it last for more than a couple of years? Please notice that the engine code is ARX and it runs with 1,5 turbo pressure (over) and goes down to 1,0 (steady). I just want some advice on if I should go on forged internals or just leave it like this......
Oh...and I DO NOT do any street races whatsoever....I love my car and I am just not in to this kind of things....
Thanks in advance!