Whichever engine you use, make certain that you get it with the latest Fritz interface (in other words, buy the ChessBase version).
@Ziryab
Why do you need the ChessBase version? I was trying to find out what the differences between the ChessBase version and the cheap version of Fritz are, so I googled and found this advice from the redhotpawn forum:
"They are identical, except the more expensive one you get a premium membership to playchess.com, and thus get the playchess.com premium content. With the cheaper one, you can still play on playchess.com, but you have to pay for any premium content you might want. It appears that the premium content is mainly training stuff.
Recommendation: If you are going to be on playchess.com a lot and interested in the training presentations (usually by GMs) which are quite good I think, I would get the more expensive Frtiz. Otherwise, I would go with the more cheaper Fritz (black box). That's what a friend of mine did, and he is happy with it."
Which led me to think I'll go with the cheap version if I upgrade. Is this advice not correct - is there some other difference?
Shredder shreds up its positions.