You can view the individual information about a computer using the "Resource Explorer" which is accessed by right clicking on a computer and selecting Start - Resource Explorer. Once launched expand Hardware and select Computer System. This will display the manufacturer and model id. Below is a query that you can create to see all the model ids you have on the network. Create a Query under Queries not a collection. After you have exposed your model ids then you can create collections based on the results of the Query.
select distinct SMS_G_System_COMPUTER_SYSTEM.Manufacturer, SMS_G_System_COMPUTER_SYSTEM.Model from SMS_R_System inner join SMS_G_System_COMPUTER_SYSTEM on SMS_G_System_COMPUTER_SYSTEM.ResourceID = SMS_R_System.ResourceId