I don't think Walker is a safe pick. He will be priced at around 105ppg. Strikes me as having limited upside and could drop back to 90ppg, and has questionable durability.
2013 is the only season that Walker has been fantasy-relevant, and his durability has been Beau Waters-like over the past 6 years (ok for 2011 and 2013, bad for 2008-9, 2010, 2012).
The only players from this season that I'd consider buying at 105ppg for 2014 are Gibbs and Goddard (if they are categorised in D).
Looks like defense will have plenty of bargains that could potentially be 95+ starters: Suckling, Birchall, Grimes. Throw in McKenzie for his super SC/DT ratio and that's most of defense locked up for 2014.