The following is a brief list of amplifiers ordered from lower noise
to higher noise for a wide range of source resistances.  This list was
ordered based on the voltage and current effective input noise at 0.1
hertz the best I could extract those values from the data sheets. 
Please note that these are not all interchangeable, since some are
singles, some are duals, most are opamps but some are instrumentation
amplifiers (effectively 3 amplifiers set up as a high input impedance
differential fixed gain amplifier), some are available in dip cases
and some are available only in surface mount cases.  Many operate from
+- 15 volt supplies but some are low voltage units that work down to
2.7 volts, total, (including several of the best choices for the lower
source resistances).  So before you order any parts, down load the
data sheets and make sure they are what you think they are. 

This represents several days of data sheet collection and data
extraction.  I hope it is some use to somebody besides me.

Source 10 ohms
LT1128
CS3001
CD3301
LT1007
MAX427
CS3011
LT1124
AD797
OP27
LT1115
AD708

Source 30 ohms
LT1128
CS3001
CD3301
LT1007
MAX427
CS3011
LT1124
OP27
AD797
LT1115
AD708

Coil 100 ohms
LT1128
CS3001
CD3301
LT1007
MAX427
CS3011
LT1124
OP27
AD797
LT1115
AD708

Source 300 ohms
CS3001
CS3301
CS3011
LT1007
MAX427
LT1124
LT1128
OP27
OP270
LT1115
AD708
LT1677

Source 1k
CS3001
CS3301
CS3011
LT1007
LT1124
OP27
OP270
AD708
MAX400
OP77
OP07
LT1677
OP97
LT1792
AD706
LT1013

Coil 3k ohms
CS3001
CS3301
CS3011
AD708
LT1124
OP270
OP77
OP07
LT1007
OP27
LT1677
OP97
LT1792
AD706
LT1013

Coil 10k
CS3001
CS3301
CS3011
OP177
AD708
OP07
OP77
OP97
MAX400
LT1792
AD706
LT1013
OP200
OP400
MAX430
MAX420

Source 30k
CS3301
CS3001
CS3011
OP177
OP97
LT1792
AD706
AD708
OP07
OP77
LT1013
OP200
OP400
MAX430
MAX420
MAX400

Coil 100k
CS3301
CS3001
CS3011
OP97
LT1792
AD706
MAX430
MAX420
LTC1151
LTC1051
CS3302
INA121
AD822
AD820
ICL7650S

Coil 300k
CS3301
OP97
CS3011
CS3001
LT1792
AD706
MAX430
MAX420
LTC1051
LTC1151
CS3302
INA121
AD820
AD822

Coil 1 Meg
CS3301
LT1792
MAX430
MAX420
OP97
OP2604
OPA604
LTC1051
LTC1151
CS3302
INA121
ICL7650S
AD820
AD822
LTC1047

Coil 3 Meg
MAX430
MAX420
OP2604
OPA604
LTC1051
LTC1151
CS3302
CS3301
LT1792
ICL7650S
AD820
AD822
INA121
OP97
LTC1047

Source 10 Meg
MAX430
MAX420
OPA604
OP2604
LTC1051
LTC1151
ICL7650S
LTC1047
AD820
AD822
CS3301
INA121
LMC6062

Coil 30 Meg
OPA604
AD820
AD822
OP2604
MAX430
MAX420
ICL7650
LTC1047
LMC6062
AD820
AD822
CS3301
INA121

Source 100 Meg
LTC1051
LTC1151
OPA604
LTC1047
OP2604
MAX430
MAX420
ICL7650S
LMC6062
AD820
AD822
CS3301
INA121

-- 
John Popelish
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