Have you auditioned the cambridge already? You can get the 540 for like 270 used, which packs a little more punch, but I have to say that the audio refinement and arcam are much better IMO than the cambridge. If you can find a Prima Luna Prologue one used then that's a great little amp (you can install a mm/mc phono card for like 160...more info at upscale audio or prima luna web site).
If you can scrape together 800, then you should seriously purchase this classe cap-150:
This is a seriously great integrated for the price, and considering it has a remote, an mm/mc phono stage, and puts out 100 pwc, you really can't beat it. Seriously, it's worth the extra money (I was thinking of getting it myself for a bedroom system, but I'm saving my moolah for a beefier integrated for the main system).
Otherwise, I prefer this Onix to the cambridge:
It's not that the cambridge is bad, seriously, and for the money it's a bargain, but more money on the used market gets you a big step up, which would probably happen anyway because I don't see the cambridge as an amp I could live with for a long time (IMHO).
get the classe, it's worth whatever sacrifice you have to make (who needs food anyway...)