I haven't seen the Digisix/Digiflash in Singapore, but judging from it's price on Freestyle, I'd probably pay the slight premium for the Sekonic.
For the moment, I just got myself a small Gossen Super Pilot for about $25. I'd be using this with a Rolleiflex (it's off to the workshop the moment it arrives for a CLA), and I just bought 10 rolls of the Arista.EDU film to try with it.
Thanks for the suggestions guys! I will probably get the Sekonic should I need it in future.