Consider using the PIC32MZ1064DAK169 for new designs. PIC32MZ DA series offers MPU like performance with ease of design of an MCU for GUI designs with it’s 2MB Flash and 640KB of SRAM, available on-chip 32MB or 128MB externally addressable DDR2 DRAM, integrated Graphics Controller, Graphics Processor, 200 MHz speed, 12-bit 18 MSPS ADC module with up to 45 analog inputs, CAN and HS USB.