In my life I bought total of 4 pedals:
1. Yamaha Flanger
2. Arion Compressor
3. Arion Chorus
4. Arion Phaser
I also had a Boss OD and couple I can not remember, but those I got for free, or in trade for other garbage. Back to topic ...
Arions were all stereo and If I remember correctly they cost me 60 Dutch Guilders (cca. USD30) a piece, back in 1992.
Yamaha was some 100,000.00 Italian Liras in 1987 (cca. USD70).
They all were more than good enough for me.
Then I bought BossSE70 in 1995, I think, and never looked back, or further for that matter.
Yamaha I gave away to someone, or have lost it(?!), Arions I've sold couple of years ago for EUR30 (USD35) a piece.