Welcome to CHR, and hope you enjoy a long run here. I'm not one of the engine guru's around here, but I'll offer you a couple of comments on what you've tossed out for consideration.
First, you don't want to pick your cam for the sound it makes at idle, or you're just wasting your money. You select your cam for performance, and let the sound take care of itself. If you get too wild with the cam you'll need to add an electric vacuum pump to be safe with PS & PB, as you won't have enough vacuum in the idle range to keep them fed.
Second, the oils sold today, other than a few select racing oils, have very little zinc and won't support long term operation of a flat tappet cam. You're not looking at "...if it will fail", you're only looking at "...when's it gonna happen?" Save a few more bucks and go roller lifter cam. If you're stubborn about staying flat tappet, never use anything but Brad Penn's Racing Oil or something equivalent that has the full complement of ZDDP to handle high pressure point loads. No matter what you read, the off the shelf oils don't cut it any more - Uncle Sam restricted them to eliminate potential CAT damage, and roadside levels of heavy metals from exhaust.