Stillens are the best performers and removing the bumper for a once in a long while maint isn't a big deal. I'm on stillens Now coming from Injens and couldn't be happier. All short intakes have an advavantage of easy maint but little hp gain, You're better off with the stock boxes and K&N drop ins.
Op: I'd suggest looking at this DiY to have a good idea on how to remove it so you're not paying someone to do it also suggest going to a local meet and talk to members who have done it, and show you exatly how to do it if you're still unsure.
DIY: Front Bumper Removal