Gdata total care -- never tried it before sorry
Kaspersky internetsecurity -- for me the best. One thing I don't like is malware removal. Seems Kaspersky is getting poor in this one. Firewall/AV/Sandbox is superb!
avg internetsecrity -- AV only I used for a year. Can't say I can recommend it...
Bitdefender internetsecurity -- Don't use this one. Made my system VERY sluggish. Same system I used KIS 2009. (alternatively FSecure is quite okay, a set and leave suite much lighter than BitDefender they have a facebook promo for 6 mos still on-going.)
Personally I don't use suite's...the last suite I used was KIS/FSecure then removed FSecure firewall in favor of Comodo. I use a layered now. In one Win7 x32 2gb ram pc I have all freeware AvastFree, Comodo Firewall with D+, PrevxSOL facebook edition and BufferZonePro Light and effective.
A friend uses the full Comodo Internet Security Suite (freeware) with PrevxSOL facebook edition and Sandboxie free.
So my verdict WHAM!!!!! KIS! Hands down! A couple of beers for KIS