I installed ICX a few days after it dropped and had no issues and, in fact, rather liked the way it ran. Had a few of Sensei's previous roms and have to say, his offerings are quite reliable and fast. I will usually run a rom for a few weeks/months and then test any new offerings that have been released, unless the current one has issues and then, return to one of my backed up images so I don't have to go thru app re-install hell. A few days ago, after ICX, I installed and am currently running Vortex-GB 2.8. It too is stable on my X and battery life has been exceptional, getting about 46 - 52 hrs. on a 1830/1900mAh battery and a constant 80 - 100Mb's of available memory at all times. Now, your mileage may very but, I also have a little over 400 apps installed (also mostly for testing) and will only reboot my X maybe once every 4 or 5 days, sometimes longer. So, mobile sensei (Sensei-Mods and ICX), deVorteX (VorteX roms), drod2169 (RubiX roms for v2.2 Froyo), ChevyNo1 (SSX roms), R3Ds (Liquid Smooth roms) and BBCrackman (DarkslideX roms) have been some of the best roms I've run to date. Hope this helps you in making a decision on a rom for yourself.
I appreciate all your help