Peterp,
Up here in QLD the most popular choice of build is a DRB or Harrison, whilst in VIC it seems to be a Classic Revival (certainly by this forum).
Obviously others are around, but by using one which is popular most of the problems you encounter have been well documented (This Forum is good for exactly that - just search on a topic and you should find it pretty easily)
Now if its a built car you are looking for, well don't be fooled by just good looks alone as it is the same with any kit car, what lurks beneath is all so more important.
Check electrics thoroughly as if it then presents a problem you have little reference material to trace the fault, even less room to find the fault under the dash whilst laid upside down with your legs hanging off the roll bar / hoops (been there done that!!)
Check for other quality of build items such as engine components, suspension, fuel and brake lines etc etc etc. as well as the general look of detail items.
Remember these cars are fibreglass and as such are prone to loose nuts due to vibration.
It is so so easy to buy on emotional impulse only to find that 3 months down the track you are spending heaps to fix it and often more importantly trying to find the right person who can fix it whilst taking good care of your baby.
Oh and good luck. Because at the end of the day when you are driving down the road with the biggest smile on your face it all seemed worth it
