Here's what I've got at my lab, affectionately called The Blockhaus:

• Agilent 54845A 1.5GHz 4Ch Oscilloscope
• Tektronix THS730A 200MHz 2Ch Oscilloscope
• GW/Instek PSP-2010 programmable power supply
• HP 6286A DC power supply
• BK 2831A bench DMM
• Fluke 26 III handheld DMM
• Dynascan 3020 function/sweep generator
• Leader LDC-824S digital counter
• HP 5334B universal counter
• Intronix LA1034 logic analyzer
• LabJack U3 USB data acquisition module
• Various JTAG programmers (ARM, AVR, Xilinx, PIC, MIPS, PowerPC, PSoC, XMOS)
• 2x Metcal SP200 soldering stations
• Yihua 8508D hot air pencil

Add to that all the test leads, tweezers, tools, probes, picks, wick, plungers, suckers and solder that usually goes with a joint like this.

The general guideline I've followed for scope bandwidth is to buy a scope that has 3x the bandwidth of the highest frequency signal you're measuring. This is to allow as much bandwidth as possible to see harmonics and other artifacts in a signal when you're measuring at the upper end of your range. So, is 1GHz necessary? For the home hobbyist and experimenter, I'd say not so much. If you need to measure over 333MHz, I'd consider it.