I appreciate all the enthusiasm. I understand what howie is saying with regards to custom upgrading a 335i as opposed to existing upgrades on the market. In all honesty, if I could see a car that had been custom upgraded and tuned with numbers close to an hpf I would definitely look in to it, but HPF is well known and very established, which gives it the benefit. Their kits have been proven not only in performance but in reliability from what I've seen so far. I will definitely keep researching alternative routes.
Thanks for everything guys and any more input is welcomed.