I was in a similar predicament to Jonathan, running over the same 'should I shouldn't I' argument in my head for about 6 months before taking the plunge into Evora ownership.
Practicality was always low on my list of priorities yet I still wanted something usable, a certain German marque just didn't seem to cut it for me, too bland and too common a sight on our roads. I had decided quite early on the individuality and driver focused dynamics of a Lotus was what I wanted but was it to be the hardcore Exige or the refined, grown up Evora?
Needless to say I opted for the Evora however I did have my reservations. As I could only afford an early model should I have been worried about spending all my hard earned cash on a low volume junior super car, just coming out of its warranty period, with iffy build quality and inter-galactic gearing? One drive was all it took to answer my questions, I had to have one and the enjoyment I get when I slither myself in behind the wheel is priceless. I have to be out driving it at every opportunity (going to have to amend my limited mileage insurance policy I think). I even volunteered my services for an airport run, three full size people and a weeks worth of luggage balancing precariously on their knees.
So Jonathan, I can concur. The Evora really is an extraordinary vehicle and yes it is practical, I am truly enjoying lotus ownership. I think you sum it up perfectly 'pure joy'