Proper Reducer for TOA-130 scope

So, now where I know that the Super Reducer won't work for me, I was looking for others. I found quite the plethora of reducers:

Number	Focal Ratio	Image Circle	Backfocus	Price
TKA31580	f5.4	44mm		$719
TKA31580L*	f5.8	65mm	106.2mm	$3000
TKA31580S	f5.8			$745
TKA32580A	f/5.4	44mm		$1190
TOA130R	f/5.76			$719

Apart from the various adapters that I need which one to choose??? Asked on the Uncensored Takahashi mailing list.

* This is the Super Reducer that I tried ...

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Most people pointed to the TKA3250A reducer. This is its spot diagram:

Not quite as good as the .67 flattener but WAY better than the 645 reducer.