Well, I've been testing out various addons today. I wasn't particularly impressed with some of the popular ones.

I've decided on these ones after testing out the ones that were kindly suggested:

• SimpleSelfRebuff
• Atlas (I used to use this one and I much prefer it over the others I've tried such as Cartographer - K.I.S.S. and all that)
• Bagnon
• QuestGuru (I didn't like MonkeyQuest or QuestHelper)
• Factionizer
• RatingBuster
• SellFish
• Sell-O-Matic
• ProfessionsBook (The jury is still out on this one - RecipeRadar, RecipeBook and Ackis Recipe List are buggy with 3.0.2)
• Auctionator (I haven't had the opportunity to try this out yet but I didn't like Auctioneer - again, K.I.S.S.)

I'm still looking for addons for the Shaman and Mage classes.