I havent heard anything bad about amigadeals or analogic.. at least nothing serious.
AmigaStuff on the other hand.... I personally wouldnt touch them with a bardge pole. As far as I know the people behind it used to be behind "Epic Marketing" back in the day.. Since that closed several sites like
www.amigagames.co.uk etc popped up all being run by the same people or person... The software sold is illegal copies..., and I personally along with quite a few others I know have been stung by them.
www.amigastuff.co.uk is the same outfit as far as I know...