I have the Crower 403's and they're very nice. I know a guy who put down 140whp with the cams, FPR and intake only. They don't "top out" at 155whp, it just depends how much work you want to put into it. As my car is now, with the S-AFC it idles "rough" but not "lumpy" with the AFC, it never even gets close to stalling, it stays pretty steady, usually between 700 and 800rpm, and that's with the cam gears tuned a little bit too, which makes it idle worse. And it's not even truly "tuned" yet, I just kinda estimated.
If you'll be happy with 150's whp and a lot more torque than most VTEC cars down low, you should totally do this setup. If you want insane, explosive high-end power and don't care about low-end or low-mid range, get VTEC. Cams give you nice top-end power, but you have the freedom to be more extreme with your valvetrain setup on the street with VTEC. Good luck. Any questions you can PM me.