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kaba I recently bought a 1/2 kilo of BKH's Fiji Waka and, after using the discount code, spent about $38 total including the 3-day shipping cost. Ordered on Monday afternoon, received on Thursday. I haven't really gotten into it yet but it is good kava. You can't go wrong with BKH or KBR (I have also ordered from them)!
I tried the Wakakon Waka when I first started looking for good kava. Wasn't really a good experience but I have read that others enjoy it. Granted, I was tossing 'n washing with it and didn't give it enough regular drinking to get over the reverse tolerance so I believe my experience was skewed. Just a word of advice if you go with Amazon, that stuff really upset my stomach, like immediately after drinking. Just be aware if you don't have the strongest of constitutions.
IMO, BKH would be the way to go because it is well known, well liked and regularly discussed as quality kava on these forums by informed individuals. Wakakon may be great but I was unable to find much detail about the people involved with that operation. BKH is a large presence on these forums and, if you choose to order from them, you'll find exactly where the kava comes from and who was involved in the process...at least state-side.
All that said, the Amazon Waka keeps popping in discussion here and there and I will say that i'd be curious to try it again being that my process and kava knowledge was severely lacking at that time. I invite you to dive into these forums and read the reviews on this site and the Kavasseur site. Those reviews really helped informed me and I bought better kava as a result. You wouldn't be paying that much more for KBR or BKH and your money would be going to good people and you get good kava in return. Good luck on your purchase!