I think an on-form Nalbandian is a bigger threat.
Simon also has more consistency than Tsonga so I'd put him as a higher threat through-out the year.
Of course, in a one-of game, Tsonga is very dangerous.
Simon's best finish at a major this year was the 4th round I believe
what's his record in Melbourne?
he plays well on the dirt and Gasquet gave him a set this year at Wimbedon but other than that what has he done on grass?
Tsonga went out early at the USO this year because he had just comeback from knee surgery and was rusty as hell
Tsonga has the game to play well and I mean pretty darn well on 3 different surfaces:the plexicusion in Australia;the grass at Wimbledon and at the USO on hard courts
Federer,Nadal,Djokovic,Tsonga and Murray and I'll add Roddick with an easy draw(away from these guys) unless he chokes the way he did against Kohlschreiber this year are my favorites heading to Australia
we can forget about Murray on clay and Tsonga too
Wimbledon is either for Federer or Nadal;next in line are Roddick;Djokovic,Murray;Gasquet;Tsonga and Hewitt if he's healthy and has an easy draw he'll go deap.Win it?hell nah!
the USO:Federer,Djokovic,Murray,Nadal;Roddick;Tsonga;D avydenko(I have to add him after 2 semis there losing to Federer every time)