My opinion is based on the BCD-1, not the BDA-1
Sacd IMO when done right with MC setup, truly is impressive. The important factor is the amount of sacd titles you see yourself buying. For me the selection is limited which didn't really justify buying my TOTL sacd player. If you like classical music where the selection in sacd is plentiful, then going the sacd route can be justified.
The BDA-1 is comparable to sacd in terms of very little to no distortion on source playback. But IMO the BDA-1 would offer a sound more comparible to dts. Which is better, uncompressed dts or sacd? I like 'em both, but prefer dts as I prefer the sharper highs as they sound more concert realistic.
So then if you see sacd as having a limited selection. Then going with the BDA-1 offers you far more flexability in source material. You can go with streaming, concert dvd's, cd's, etc. elevating all these formats to high resolution low distortion levels of sacd.