to thump or not to thump?

gentleman

got a newly built 416 stroker from a 340 that i need cam advice on. the motor currently has the comp cams xe 268/280 477/480 lift cam in it. however ive been told by a number of people this may be a little small for my combination? i got it prior to deciding on 416. car runs good but dont seem as strong as it should be? in any case im leaning towards the edelbrock performer rpm cam 308/318 480/510 lift simply because i already have there manifold to compliment it. that being said im not sure ill get the lope i want at idle with that? whats your thought? therefore im toying with the idea of the middle thumpr cam 287/304 497/483 lift. i need to get it right the first time cuz once its in its in. ill list my current package...

416 stroker eagle crank
eagle h rods
the above cam
diamond pistons 9.4.1 compression
factory x heads ( may change up to performer rpm later date?)
354 rear gears
27 inch rear tires
727 factory trans
unknown size of convertor but most likely stock spec.

this is not going to see a race track. just want a strong street package. one last item is above 200 degrees engine temp i will get detonation on full throttle with a conservative timing set and premium fuel. would a longer duration (bigger cam) help or hinder this? ok this is your motor. what would you choose based on your knowlege? thanks in advance.

B.T.W. anyone suggest a good solid performance shop in the boston area that deals in mopar maybe?