Why don't you just read the reviews on Amazon.com (or somewhere else) and digest with a very large grain of salt?
It is highly unlikely than any random MacRumors reader has tried all three.
The primary function of this site is to discuss Apple rumors. It's not really an equipment review site nor is it directly focused on selling items.
MacRumors does have a Buyer's Guide, but it doesn't actually tell you if a particular model is "good" or not. It just tells you if it was recently recent.