Agree with 777 on the ICUS issue. (you'll be waiting a long time and expected to pitch in with the work at the office under the term 'commercial experience')

You've been warned!

I don't agree with flying a Baron for speed limitations though, that is where your ICUS/line training comes in. You will be pretty comfortable with any twin after 30-50 hours on the line. I went from a duchess to cabin twin with no problems whatsoever along with everyone else at the company.

In fact a PA31/402 type twin is easier to fly than a smaller trainer. Provided you understand and nurture the engines you will have no problems.

learning
 

If you are intending to go into g.a. I'd be steering clear of aircraft that have all the bells and whistles (HSI GPS RMI). I'd be opting for the cheapest aeroplane with the most experienced instructor. The person sitting next to you is 1 million times more important than the aeroplane that you choose when it comes to learning.

Yes I agree about the instructor sitting next to you thankfully I am surrounding by a wealth of experience when it comes to my instructors.