You are very lucky cause i own a Silverstone FT03 and I can tell you my experiences with it. and i also made a build log on this a few months back if you wish to look to give you a general Idea.
Any GPU Length will fit if you remove the 120mm Fan on the bottom of the case and replace it with two 80mm fans. also for future reference I have an OC GTX 770 Classified (which as you know is a MASSIVE Card) I have it overclocked and i haven't noticed ANY overheating issues what so ever (even during the summer i've never seen the card go past 80C Ever,
The Nocuta D-15 will fit but be VERY Careful cause it will be a bit close to the GPU. if you wish to save yourself the trouble i would just recommend you get a GPU with a Backplate to save yourself any issue of Electrical Discharge if it were to happen.
The Optical drive MUST be a Thin Slot loading Optical Drive. you can't fit a normal traditional style Disc Writer.
The PSU will fit if it is no Longer than 180mm in length
Kat, Thank you. Your build is just immaculate. Thanks for the really awesome advice and your build log will definitely help me with this build. You saved me woe that i'm going to have with this build. Again thank you