The book is very comprehensive, yeah :D and there are several rulebooks in addition to this one.

I'd say it's not completely overdone, but if we're going by Essence as an indication of how much the body can handle, then four cyberlimbs, wired reflexes, and muscle replacements at their lowest ratings bring you up to 6 already. I'd suggest getting rid of the cyberlegs and keeping the rest. Would also make more sense to have muscle replacements if you have some limbs left to replace the muscles of ;) Putting a gun in one arm (totally possible, by the way—cyberguns usually fire through a port in the palm) and hand razors in the other sounds fun. 

As for the eyes, I'm not sure what you mean by a radio, but you can stuff a commlink in your head (or one of your cyberarms!) if you want.