You probably would have been better off with a netbook or even an ipad, and a high powered PC with big monitor for processing and viewing your pictures.
Maybe look at something like a Shuttle R5 with i7. Very powerful yet small and sleek designs that don't take up that much space. OS is practically irrelevant as photoshop and lightroom work the same anyway.
Errrr
I have an iPad and a 24" iMac ? lol
And I am planning getting an i7 with a 27" screen with SSD, the whole thing will be silent and fast.
As for the OS is irrelevant when doing LR and PS stuff. True, that that is only true within LR/PS. I use my computer for other stuff too.
Plus, I like the OS, I really am tired of the endless updates from MS, the endless drivers, the separate tower, the added cables everywhere (only 1 power cable for the iMac), I just like OSX.
I now see computers as a way to serve me, Apple stuff serves me. I find that Microsoft windows I have to serve it. I have to keep servicing it to keep it running smooth. It's not like I don't know how, I just don't want to now. I don't want to bother to look into the latest Anti-Virus or firewall to use, the latest spyware to run, regular defrag the drives, update this and that drivers.
It's a total waste of time. On OSX its like:
"You have update" Click, download, install.
It happens once in 6 months and it is so much easier, there are no "critical updates" or "non-critical" updates. I like how it is simplified.
Can I get a cheaper Windows operated PC? Yes.
Can I get OSX installed in a non-Apple hardware? Probably.
Can I be bothered to install OSX in a non-Apple hardware? No, I just can't be bothered. Don't have the time. Time better spent doing work.
Do I mind paying that X percentage more for Apple stuff? No.
Do I care what randoms think of my purchases? Not in the slightest.
Do I care how they run their business? No, I buy their products, not their ethics.
Also, with Apple, any problem you take it to the Genius bar and they WILL fix it for you, with Applecare (which I can get for free), everything is covered. If my windows PC breaks, I have to pay some guy in a shop to fix it or spend ages fixing it myself. For 10 years I've done that, been there, got the T-shirt and I don't want to do it anymore.