The ‘next model up’ from the DesignJet T120 is the DesignJet T520. Key differences include: Higher speed (50% faster), Higher print resolution (2x), Stand included, Original HP-GL/2, More memory, Larger footprint. Check it out here.
The HP 1 year Hardware Maintenance Onsite Support cover included with your Designjet purchase provides the following:
Standard Material Handling
NextAvail TechResource Remote
Standard Office Hours, Standard Office Days
NextAvail TechResource Onsite
No Usage Limitation
Next Cov Day Onsite Response
Standard Parts Logistics
Parts and Material provided
Hardware Problem Diagnosis
The Limited Warranty terms and conditions for most HP-branded options (HP Options) are as set forth in the Limited Warranty applicable to the HP Option and are included in the HP Option product packaging.
If your HP Option is installed in an HP Hardware Product, HP may provide warranty service for either the period specified in the warranty documents (HP Option Limited Warranty Period) that shipped with the HP Option or for the remaining warranty period of the HP Hardware Product in which the HP Option is being installed, whichever period is the longer unless stated otherwise in the "Limited warranty period" section.
In all cases, the warranty period of the HP Option will not exceed three (3) years from the date you purchased the HP Option. The HP Option Limited Warranty Period starts from the date of purchase from HP or an HP authorized reseller. Your dated sales or delivery receipt, showing the date of purchase of the HP Option, is your warranty start date. See your HP Option Limited Warranty for more details. Non-HP options are provided “AS IS”. However, non-HP manufacturers and suppliers may provide warranties directly to you.