I'm not slamming on the guys that prefer "the real McCoy". There's a lot of charm in the old legacy Amiga systems, that's for sure. Charm you'll never really get from an emulation machine if what you are after is an old timey, full fledged hands on experience with an original Amiga.
I simply got sick of frittering around with 20 year old hardware, hardware that took up too much space, was too cobbled together. I found it far easier just to throw a Mini ITX machine together, and I picked up a Corsair K90 mechanical keyboard to give me the old time clicky experience.
Lurch, case I used for my Mini ITX build is neat - sort of reminds me of the Walker case in a vague way:
http://www.antec.com/product.php?id=2102&fid=23My rig has XP installed but I've got it setup so it boots directly into WB 3.1, never see the Windoze side at all unless you need to. Emulation isn't for everyone, but even the most dedicated Amiga guys have fun on my little M-ITX rig. It's dead silent, power efficient and absolutely tiny.