Anon - what sort of consultancy are you looking to join - or - put another way, what work do you want to do as a MC?
Have you had any exposure to MC within your current role, albeit on the IT side?
For me, there are 3 routes into what is loosely referred to as management consulting:
a - graduate, GMATs, rigorous interviews and appraisals and bespoke tests - leading to a job at a major firm with thousands of graduates and geometrically fewer people in each subsequent grade
b - joining a small (boutique?) consultancy as a junior grunt - doing the filing, waiting to be taken under someone's wing and eventually getting the chance to fill in for them and step up
c - joining from "industry" with either experience in an area a firm wants to get into or grow - e.g. former civil servant joining a public sector consultancy - or as some sort of subject matter expert - e.g. medical clinician joining BT or Fujitsu on a major NHS programme
I may have misread or misunderstood your post but I had assumed you were in group c - bored of your current career choice and looking to move across into something new, using an existing skillset.
If you are under 26, then a & b may well be open to you, if over, then, from my experience, c or nothing.
I guess large cos look to recruit graduates into their own image, knowing what works for them and what personality profiles work. Smaller cos will be looking for an incredible knowledge of one's area or someone who their clients will trust, recommend and use again and again.
I would have thought you could easily put forward a compelling CV and start going through the interview experience to see how you are perceived.
Salary and bonus - depends on so many factors, the main one being, in my opinion, your age.