I have not had experience with Inmotion but I have had experience with WiredTree and I can say they are a great provider - support is top notch and everything is fully (and well) managed and monitored.
I don't have any experience with INMOTION so...I can't really comment on them or their service, but, I do have a server with WIREDTREE I can say that so far their system and service has been absolutely perfect ~ ZERO downtime via outside monitoring!!
Hopefully it will stay this way for a long time.
Also, BLUEMILE has been good to us as well as IWEB