I don't have a dream configuration.... Just want something adequate for my needs when, sooner or later, it comes to a repair or replace decision for my early 2009 Mac Mini (base model with an extra 4 GB RAM; still running the original 120 GB HDD)...... Replace is the likely option for a 10 year old computer.
A new Mac Mini would be would be complemented by the MacBook Air I recently acquired (mainly for work and occasionally travel). It would be in use or sleep mode 24/7, with the apps I frequently use usually open, thus fast boot time and snappy app opening are not a priority. A decent amount of storage is more important as I do quite a bit of photography at sports events and concerts, some of which is used in the local press or on websites.
The best bang for buck, from my point of view, in the current (2014) line up is the mid-range model, with 8 GB RAM and 1 TB HDD. Fusion Drive would be nice to have, but hard to justify the extra cost. A similar configuration, off the shelf, in the new range would be fine by me.