I find myself a bit torn on this subject.
There are two different ways to look at it:
1. It's turbine multi PIC, which is the gold that gets you to the majors. It is light turbine PIC, but it burns that wonderful smelling kerosene and checks off that box in the major applications.
2. It's not 121- Getting hired at a major without 121 experience is quite rare. There may be a dime a dozen RJ drivers, but 9 out of 10 in my new hire class at Widgets-R-Us were coming from RJ's (the other was a former Cactus whale driver and 737 captain- her hubby is a captain for us and she had taken a few years off to take care of their sick child). A 121 jet captain is gold for getting hired at a major.
I have flown king airs for corporate in my past doing the same type of flying that you'll be doing. I wouldn't expect to get 95 hours a month like the regional guys do... maybe 300 hours a year. Another issue is places like that many times expect a certain time commitment for the company if you go to training. Also: what are your flying times and will you qualify for the insurance for single pilot king air? My company that I used to fly for required some pretty serious flying time (they were insured for a tremendous amount of money, though)
The perks of it were previously mentioned- the rental car, the expenses paid for vice per diem. Sitting in the FBO and being at the beck and call of the boss weren't particularly up my alley.
I like flying more and the potential for making alot more money. Even with all the cuts, being pampered at a major just can't be beaten. I prefer walking to the gate and seeing my release coming off the printer... basically error checking and seeing if the flightplan, fuel amount, and alternate selection are what i want. The dispatchers here are extremely good and I can see how one could get lazy- it's extremely rare to find an error. The OCD twitch in me from always watching my back at the regional with inexperienced dispatchers keeps me always looking over the release with a fine-toothed comb, haha. (That in itself is a perk of going to a regional- If you bust your butt and really try to the job right, you will develop excellent habits that will make the rest of your career and any transition super easy)
You may find that corporate stuff is for you- we each have our own niches. I proudly have my own, but what I love is not what others might love (which is good!) Keep us posted and the best of luck to you!