The Mac Mini with an external display (obviously) is my Mac of choice for the desktop. You can install an SSD and (now) get a quad-core CPU. The only negative?

The Mac Mini with an external display (obviously) is my Mac of choice for the desktop. You can install an SSD and (now) get a quad-core CPU. The only negative? Onboard GPU. For some people that's a dealbreaker. Thunderbolt might provide a solution for these people (but hasn't yet). For laptops, I love my Macbook Air 13". MBPs are a reasonable option if you want a hybrid of the Mac Mini and the Air. The problem that always puts me off with the iMacs is how hard they are to upgrade. You have to remove the glass. If you buy it with an SSD, you get an SSD bracket (and you can replace that SSD). If you don't buy an SSD you don't get that bracket and you need to do some finnicky upgrades to get it in there. I wouldn't object so much except the iMac SSD is really expensive and, at best, mediocre. As nice of a package as that is, it's a dealbreaker (for me). What I'd like to see in the Mac line is an upgradeable, affordable desktop. Basically take a case like the Silverstone SG07B that takes a mini-ITX motherboard (which you can get motherboards for any modern Intel CPU for) and it also takes a double-slot GPU and has a large enough PSU to power pretty much any modern GPU. You can also fit in 2x 2.5" drives and 1x 3.5", which as far as I'm concerned, is just about perfect (SSD mirrored plus a scratch disk). That's what I hope they come out with. I'm not holding my breath however.