RIA will be a good starter and solid performing 1911. IMO, if that it is all you can afford at this time, it is better to have a 1911 now, than wait. Lots of things could happen in between that wait empty handed, while saving for that Kimber, and lots of range time could be had, if you had that RI.
I would get it, shoot it and shoot it a lot. Once you have the money, trade up or get the Kimber, or better yet, have two 1911's.
It is always better to work your way towards quality and appreciate any brand, while learning the basics of a fine pistol platform like the 1911. YMMV
"There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter." - Hemingway
“The greatest ignorance is to reject something you know nothing about.”