Which GPS module?

Projects Networking, Protocols, and Devices
1

I have am developing a new GPS library and need advice on which GPS modules to support.

I used an EM-406A on an Adafruit GPS shield for the first version Google Code Archive - Long-term storage for Google Code Project Hosting..

I am considering a Lassen IQ module next. The IQ is old but it is often used for high altitude logging since it works above 60,000 feet at lower speeds.

The GPS shield supports a connector for the IQ but it doesn't bring out Port 1, the TSIP/TAIP bi-directional port. This means I can't configure the module when it is mounted on the GPS shield. I already parse the default NMEA messages from the Lassen IQ.

Any advice or suggestions for other modules. The module doesn't need to be mounted on the GPS shield.

2

How about one of these?
http://www.mdfly.com/index.php?main_page=advanced_search_result&search_in_description=1&zenid=uo6ftar0o3dqntge7td2072tl1&keyword=gps