hand held GPS

Magellan eXplorist XL 3.5", 176x220, 16-color, 30MB Map, 30MB data, SD card, 14 channels, 4AA, 19 hours, 2.9"W x 6.4"H x 1.33"D, 12.25oz, Hot: 20 seconds, Cold: 60 seconds, Initial: 2 minutes

MotionBased supported GPS

Garmin Comparison of Handhelds
Comparison of 3" mapping handhelds
Topo Map supported products
Garmin Oregon 400t 3", 400x240, microSD, 2AA, 16 hours, 2.3" x 4.5" x 1.4", 6.8oz, Electronic compass, Barometric altimeter, 300 does not have Topo map
Garmin eTrex Vista HCx 2.14", 220x176, 256-color, microSD card, 2AA, 25 hours, 2.2"W x 4.2"H x 1.2"D, 5.5oz, Electronic compass, Barometric altimeter
Garmin nüvi 360 3.5" 320x240, 5.1oz, 8 hours, 3.87"W x 2.91"H x .87"D (9.83 x 7.39 x 2.21 cm)
Garmin nuvi 660 4.3" 480x272, 6.2 ounces (176 g), lithium rechargeable 7 hours, 4.9"W x 2.9"H x .9"D (12.4 x 7.4 x 2.3 cm)

Lowrance iFINDER H2O C 2.83", 320x240, 256 colors, MMC/SD card, 16 channels, 2AA, 14 hours, 2.5 x 5.6 x 1.2, 8.7oz

WAAS

Top 10 GPS

SiRF star III chipset
SiRFStarIII
STMicroelectronics Teseo
NemeriX low power
u-blox

Garmin eTrex H series uses MTK chipset
GPS Chipset comparison MediaTek MT3 SiRF Star III Semtech XE
Solar GPS Solar Bluetooth GPS receiver (MediaTek MT3), Transystem iBlue-757 (NemeriX)

Garmin GPSMAP 60Cx 2.6", 240x160, 256-color, microSD card, 64MB card, 12 channel, 2AA, 18 hours, 2.4W x 6.1H x 1.3D, 7.5oz, Warm < 1 sec, Cold < 38 sec, AutoLocate < 45 sec

GPS market SiRF vs Global Locate