Every NBA team has at least 6 bigs lined up on their roster. Do they all play? Heck no. Only half of them play. But it is always good to have insurance just as u have car insurance.
I see what u are saying, but it doesn't justify that Suns can roll with Amare and Marks.
Period.
First of all, there are teams other than Phoenix that don't have 6 big men.
- San Antonio, for instance, has 5 right now (Duncan, Elson, Oberto, Horry and Bonner). They might sign Mahinmi (last year's draft pick), but that's not a given, considering they already have 14 players and are reportedly interested in Troy Hudson.
- The Cavaliers have Ilgauskas, Gooden and Marshall signed. If Varejão re-signs, they'll have 4 big men. They'll probably add another big man, but I don't see them adding two.
- Utah has Okur, Boozer, Collins, Fezenko and Millsap so far. Kirilenko can play some PF, but so can Marion.
So, before you tell people to steer away from hasty generalizations, it would be nice if you stopped with your exaggerations.
Plus, whether we like it or not, Diaw is a big as long as he's playing for Phoenix. He'll play almost exclusively as a PF and as a C for the Suns. Can he be a liability on defense? Sure, but so can Amaré at times. Also, whether we like it or not, Marion WILL play a lot of minutes at PF.
The Suns are different from most teams in the NBA. Due to their style, they don't need 6 bigs on their roster. Right now, they have 3 guys who can play at the two power positions in their system (Amaré, Diaw, Marion) and a 12th man who might be used in an emergency (Marks). So they aren't just "rolling with Amaré and Marks".
They need to add another player to reach 13, and I think it's pretty clear this player is going to be a big, so that brings their number of bigs to 4 (or 5, if you count Marion), which is a reasonable number if you consider their system. If they add PJ Brown later, that number will be pushed to 5, which would be acceptable even for a team playing a more traditional style.