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I use two Tele Vue 8-24mm Click Stop zooms (discontinued) with my Bino Vue and these work well. I also use other fixed length Tele Vue and Brandon eyepieces. I have never had an issue with eyepieces from different production batches as the ones I have were bought many years apart. However I have heard of one brand in particular offering matched pairs but could never understand why unless there is such a huge variation in their stated focal length that they need to do this.
The Baader will work for you provided your IPD is not less than 55mm (diameter of Baader 8-24mm Mark IV). It is an expensive option as you need two. To get started see if you can purchase another 25mm EXACTLY the same as the one you have as these are cheap and will give you a great view in your SCT with the binoviewer. One thing that you should look for is to ensure the field stop diameter of the eyepiece is not larger than the clear aperture of the binoviewer or you may see vignetting. A 25mm Plossl will have approx 21mm FSD and if your binoviewer has only 20mm clear aperture you may notice ever so slight vignetting but I would not see this an issue. The Tele Vue Bino Vue for example has 27mm clear aperture and can accommodate a pair of 32mm Plossl or 24mm Panoptic.
Have fun! Make sure the Moon is your first target at about 10 day old; it is truely spectacular in a binoviewer!
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