Time for another update I guess...many of the parts have now been ordered and are on route - list of what I went for (I'll also edit this into the opening post) follows. FWIW I'm up to around AUD5800 (for ordered, projected and budgeted) excluding batteries - this includes freight costs etc. and is for everything including brake pads, lines, rims, tyres. Obviously I've actually spent more as purchased spares at the same time...and a range of required tools either purchased or on there way. I suspect someone in the US would be able to do this for under USD5000 (exchange rate and freight savings). By the time I accounted for the cost of the frame, the motor and the controller/BMS/display (was always going to go MaxE) which was in excess of AUD3k delivered, I decided that the optimum level fitout was appropriate. Looking at costs of DH bikes with the kinds of components I'm fitting, these started at over AUD6500 in oz...so figured I've actually done quite well. You could easily build for cheaper by going with a cheaper option on controller, forks, shock, brakes etc.
List of ordered:
Rear Shock - Cane Creek Double Barrel
Rims - Torpedo 7 own brand 19x1.85 7075 ally
Tyres - Shinko 241 2.75x19 (will also have Shinko 244s to try)
Head Set - Cane Creek Series 40 ZS
Spacers - variety in ally (gold and black) and carbon...and a cane creek interlock spacer. Looking at offroaders fork/headset fitting, I may need more though...
Stem - Crank Brother Iodine 2 65mm (damn accesory bits in silver though...and supplier doesn't have gold so no changey....might try and contact crank brothers to see if they can send out the accessory bits in gold)
Handle Bars - Crank Brothers Iodine 2 AM Riser handle bar (looking at it, should maybe have gone with more of a rise....we'll see when it's all built)
Crank & BB - Shimano Zee FC-M645
Pedals - Shimano Saint PD-MX80
Seat Post - Truvativ Husslefelt Seatpost 400mm (gonna be too long...but that's what angle griners are for...

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SP Clamp - Gold Procraft PRC
Front Hub - Shimano HB-M820 36H FH Disc
Brakes - Shimano Saint M820
Disc Front - Shimano Saint RT99 Ice Tech CL 203mm
Disc Rear - Shimano Saint RT86 Ice Tech 6 bolt 203mm
Rear Deraulier - Shimano ZEE M640 Shadow Plus
Shifter - Shimano ZEE SL-M2640 Rapidfire plus
Parts still to get:
Forks - Fox 40 RC2 FIT Float Kashima - trying to source these at a reasonable price with the steering tube intact...no joy thus far. Wish I had of bought those white ones for $950 and bit the bullet on painting em.
Motor - will defintely be Cro, just finalising payment info to order
Batteries - will be samsung 25Rs, hoping to fit in 22s12p in 3 or more separate 'packs'
Controller, BMS and display - waiting for MaxE adaptto to be back in stock
Spokes - waiting for Shimano front hub and torpedo rims to measure up
Throttle - still deciding on this one. The domino pot looks like a reasonable option, and by all accounts is pretty well made. Still a pot though... Also, rumour has it the Adaptto lads are working on something with thrust one way and regen the other - a dual twist throttle. May go for a cheapie thumb throttle in the interim and wait for the Adaptto solution...
Switches - any suggestions? Guess I'll need to figure out exactly what I want switched...and an additional thumb throttle for regen?
Rear Freewheel - contemplating one of the DNP 7sp with 11 tooth higher gear just worried it may not fit...hmmm
Seat - probably get a Velo comfort and a Planet Bike ARS (do have the moto seat coming with the frame)
Now the patient game of waiting for everything to arrive....then the even more patient game of actually putting it all together...