Given the title of your post "a coffee machine for an occasional user", I can recommend a Krupps B2C, I've had my EA8150 for almost three years and it makes a nice coffee depending on your choice of bean.
If you are thinking of Nespresso then you are probably aware that Vertuo machines tie you into buying expensive pods directly from Nespresso until their patent expires 2023, all reports are it makes a nice coffee though. However the the older Nespresso machines use the aluminium style capsules and other options are available from the likes of L'Or and Starbucks.
just something to ponder