I think rubix focused is great if your looking for no blur whatsoever along with fission, but rubix, imo, is more stable.
I think Apex and Rubix blurry are great for some blur, but not in your face. Both run like there isn't any blur whatsoever.
Simply Stunning if your looking for a themed blur, but can remove blur with a ready made application by chevy.
I think rumm-rx is great if your looking for great features with the rom besides a spare parts app. Jrummy really has done well with this and his overclock app. The mixture of animations all into one, imo, has kept me on this despite the little kinks that need to be worked out. It's still v1.0 and has been very stable, speedy, and has had great battery life for me personally.
Tranquility is nice too, but since 3.5 bricked my phone after I had updated to the leak, and luckily the system sbf was all I needed, I figured I'd wait it out a little bit and went with rumm-rx instead.
I've been running rumm-rx since it came out and I've been very happy. I'll consider Ultimate Droid once it's stable for everyday use, but for now, i'm content. Hope this helps in any way whatsoever