There are a couple of good C models in the UK just now and no, they don't need to be avoided at all costs but like its always mentioned here - get all the proper surveys done before buying.
The seller will tell you if the ship is certified for IFR and there are more than a good few outfits who can quickly tell you what it would cost to bring the helo up to IFR standard if that's whats required.
This one would be right up your street (unless of course you have the money to splash-out on an E or S). But as a two seat IFR training aircraft the C is perfect.