But who will come out on top and, more importantly, will you agree with your team's selections?

Here, BBC Sport gives you the chance to choose your own 13-man line-ups.

Bradford sacked new signing Ryan Hudson after he was suspended for taking steroids. That has meant Robbie Paul staying at number nine rather than moving back into the half-backs.

Huddersfield claimed the capture of former Australian Test player Michael De Vere was one of the biggest signings in their history. They have also brought in respected hooker Brad Drew.

Hull have added quality to their squad in Stephen Kearney and Nathan Blacklock. With all their young talent, this could be a big year for the Airlie Birds.

Leeds have the most settled side in Super League and made just one signing for 2005. Gareth Ellis made a huge impact with Wakefield and will be looking to do the same with the Rhinos.

Leigh will have one thing on their mind this year: Survival. They've recruited heavily, so the key will be whether the players can gel into a solid unit.

London have lost playmaker Dennis Moran but have signed arguably a more influential player in Mark McLinden. Thomas Leuluai's arrival is also a big coup for the Broncos.

Salford have plenty to thank Wigan for before the season even gets started. When the Warriors decided to offload Luke Robinson, the Reds pounced on one of the brightest talents in the game.

St Helens signed Michael Smith only to see the second row forward quit just days before the start of the season. Former captain Chris Joynt has also retired but Jamie Lyon is a big-name recruit.

Wakefield will be hoping the departure of skipper Gareth Ellis does not hit them hard. Julian O'Neill's signing is a gamble but one worth taking.

Warrington have sharpened their attacking edge by landing Lions centre Martin Gleeson. Lee Briers will continue to pull the strings from stand-off.

Widnes coach Frank Endacott has been busy in the off-season and will hope the experience of Terry O'Connor and Gary Connolly can help his side avoid the drop.

Wigan have lost skipper Andy Farrell to rugby union and saw Luke Davico head home to Australia because of injury. But in Kris Radlinski they have another player capable of leading from the front.