What is illustrative is how some armies have been able to man, equip and train their reserve armies with top of the line kit without breaking the bank, and apparently getting good results as well.
The number one on the list is the United States National Guard and Reserve, which if fielding complete combat and CSS units in Iraq. These units are in the thick of the fight, and certainly perform their jobs "over there". From what I remember, the NG normally trains one or two weekends a month, and has an annual concentration, roughly the same amount of time our reservists spend training as well.
Sweden hasn't gone to war in a long time, but their troops are concripts, and after the end of their terms they are mustered into the reserves. They undergo no continuation training, but do an annual two or three week concentration. Their Leopard 2 tanks, FH 70 cannons and CV-90s are held in warehouse-like bases and maintained by a full time cadre, only to be taken out on EX for the concentration. Most of the air force is maintained by conscripts and reservists as well, but they have no trouble with the Gripon or Viggen jet fighters.
There is no reason the Reserves could not be manned to "real" unit status, kitted with first or second line equipment and tasked to perform as formed units if there was the will to do so from the electorate and government. Reservists fall on the bell curve like any other group of people, and would add a certain depth to the regs because of their varied skill, educational and experiential backgrounds. Starting from such a small foundation and starved of resources as is the case today, it is no surprise the Reserve is unable to do more than they already do.
Should the "will" become manifest, then the title of the thread would indeed be correct, the RG-31 (or comparable vehicles like the ADI Bushmaster) would indeed be ideal for the Reserves, and for a lot of tasks in the Reg force as well (think way outside of the box and picture a "Canadian AirForce Regiment" tasked to protect airfields, for example) that do not fall in the high end of Full Spectrum Ops.