Surprisingly, I disagree, actually.
To be fair, only one stands out in ANY way for me, and that's CaptTatsu's BSL Shaders (V6.0 is what I tested). Reasons: it provides helpful options that make sense, including wavy leaves on/off, etc. It has the nicest colouring (to me) and doesn't have over-the-top blur, bloom, vibrancy, fog, or whatever else.
Most importantly to me, it includes colouring options for different sources of light, water tint, etc. So my ModularPowersuits' "Flux Lamps" don't give off a very candle-esque light and instead can give off a nice white light which makes my base look normal.
Other things to note is that EnderIO machines seem to look OK. OpenComputers screens kinda work if viewed at the very periphery of the vision, but basically don't work even still.
Unfortunately, in my main base area, my frame rate is ~10-20 FPS which is completely unacceptable. In a flat world with basically nothing in it, I get around 45 FPS, but there's a huge glitch with the sky - probably something to do with the RFTools dimlets it uses (random).
I've even tried turning the graphics down to basically all options disabled (so just shadows and a little lighting, essentially) and it's still completely unplayable.
Perhaps one day shaders will be possible, but for now, no shaders it is for me.
EDIT: The torch-light colour options do also change the texture colour of light-emitting blocks. Glowstone (normally yellow/gold-ish) is now white, as are magma blocks... Does look a little odd, especially in the Nether.
What kind of performance were you getting with SEUS? Part of what I liked about it was it was also the better performer of the high end shaders. I did find some things I liked in some other ones as well, but the water and stained glass effects were too good on seus 11.
Either way, though, for actually playing, I'd much rather a consistent 90+ fps with perfect visibility over any shader. The internal shader is just a better experience for me. Especially at night. Shaders make everything look orange.
I haven't tried that one you mentioned though, so maybe I skipped over a gem.