You do not want an extra comp on a 17c - the gun will fail to cycle with that much energy removed.
Serious race guns are a lot of money. I think most would suggest you get started with what you have because experience will teach you what you want/need.
In the Glock world the 34 is typically what professionals use for competition. Either stock or heavily modified for open.
Glock has a 3person US team with two female shooters and they regularly win top competitions. https://us.glock.com/en/connect/team-glock they are all on social media and super nice to fans. Glock has different pro teams in different regions so there may be some closer to you to follow and see how their guns are setup.
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