I suggest setting the document up as a table of evaluation criteria. It would have (at minimum) two columns, the first a list criteria that you, key users, and others in IT agreed were good to meet or measure. Then the second column is the assessment of how successfully those criteria are met by Laptop X. If you have a look at any recent PC magazine, you should see a "shoot out" or product comparison that gives an example of this.
Some criteria you would probably include are:
- Price less than $X
- Weight less than Y
- Minimum battery life of Z hours
- Time to reach full battery charge from empty
- Removeable media bay optical disk
- Number of USB2 ports
- Wireless standards supported
- Bluetooth capability
- RAM supplied / Max RAM capacity
- Hard disk type/speed
- Time taken to open Application A and test document 1
- Compatibility with Product A
- Time to transfer test file 1 over test wireless network to test server
- Windows 7 system rating
- Time to run benchmark X
- etc etc
If you were keen you could score these on 1 to 5 scale and add them up... Whatever suits the boss.
A wiki as PP discussed is one way you could collect the eval results, but copies of a simple template document (eg in Word if that's your standard tool) would do. Run up an example in 15 mins and show the boss to see if you are on the right track.