I'm not sure we're talking about the same thing. The 'huge gym guy', as I understand the concept, is certainly not 'peak physical condition'. It is a condition of physical abnormality achieved by a concerted program of unnatural practices, from the exercises themselves to the processed and unbalanced diet to the drugs. It results in huge muscle mass, but that is to the detriment of general physical fitness - i.e. in the vascular system. Don't forget that Bruce is supposed to be a martial artist and an acrobat; he is supposed to be able to skip along the rooftops in tandum with Catwoman. The 'peak physical condition' for him must lie somewhere in the range of Joe Calzaghe and Usain Bolt.
This goes to your second point- the notion that Bruce would spend a large slice of his time lifting weights. Of course he would do everything possible to keep himself physically honed, but this doesn't equate to the attempt to maintain an exaggerated muscle mass. Again, his speed and agility are equally important. There is also the question of time and feasibility- between the crime fighting and the 'day job', where is it? I'm sure he would use what time he had where possible, but he simply can't look like someone who spends six hours a day in the gym merely to sculpt themselves.
Anyway, this is all moot, because we seem to be agreed on what is appropriate. I was initially reacting to the term 'huge', which put me in mind of the inhuman proportions of the videogame Batman, which would clearly be inappropriate.