Some great stuff in here:
http://metalforum.com/death-metal/1075-suggestions.html
And here:
http://metalforum.com/death-metal/653-technical-death-metal.html
Also, check out Cephalic Carnage's "Xenosapien" and "Lucid Interval". With the exception of the new Gorguts, which might not fit your taste, I'm not personally excited by a lot of death metal from the past 15 years or so. I'm sure others can chime in with more relevant recommendations.
However, if you can deal with old-school sound, Suffocation's "Pierced From Within" and "Effigy Of The Forgotten", Sinister's "Hate" and "Diabolical Summoning", Immolation's "Here In After" and "Closer To A World Below", and Cannibal Corpse's "Tomb Of The Mutilated" come to mind as a handful of classics from the earlier years.