Electronic Barometer/Barograph What are important features?

[Onemoreproject]

I have thoroughly read several posts about electronic recording barometers. i have researched different units and found that they vary in price and features. They range in price from 50 to 250 for what i think i need.

I would like to know which of these features are most important:

The $200.00 NASA MateoMan stores 7 days of history, connects to the ships 12v system. But it does not have alarms or interfaces with a computer.

The 229. Weems and Plath runs on AA batteries, stores 48 hours of history, has alarms, but does not interface with a computer.

There are other contenders that have 24 hour history from Science Lab and Fisher. They run on batteries and have computer interface. They range around 150.00 to 190.00. so price isnt the issue. It depends on how much history is needed and if alarms are that important.

Looking forward to input!!

Thanks so much in advance!!