I'd buy the Oceanic b4 I'd buy the other two. The Cressi package price reflects the fact that there's no
computer. Not that that's bad but it means you'll be table diving - a computer lets you maximize your bottom time. Just about everyone has one and will be staying down longer than you most likely. Except your buddy...
Sherwood is a good solid line, I personally think Oceanic is slightly better. Personally I think any package is a compromise as it's built to meet a price point. Also notice that the Avid is an 07' model. A lot has changed in five years. If it's five years old - even stored properly, I'd be concerned about rubber deterioration.
Which of those brands is your local LDS(s) authorized to service? Unless you live in NYC, I wouldn't like sending my gear back to LeisurePro annually.
Does your LDS compete with online sellers? We have one here that will match prices on anything they sell.
Do you want a jacket style BC like the Probe or Avid? A lot of people prefer a back-inflate BCD like most of the Zeagle line.
Where do you plan to dive? warm or cold water? If very cold, you may want a reg with an enviro kit so it doesn't freeze/freeflow. Or one that can be to added later.
If you plan to travel a lot to warmer destinations, there are travel bc's that are designed to be more compact for packing. Many times they trade lift for convenience so aren't as good in colder water. None of the three BC's in those packages are travel gear. There are also some hybrids that will work equally well in either.
I agree with the above poster, rent as many different configurations as you can from local stores in your area - you might find something that you just have to have which will dictate whether you buy a "package" or not.
Have you looked at Scubatoys.com - they also offer packages. Everything they sell carries a full mfr's warranty also. LeisurePro sometimes offers their warranty in place of the mfr's - I'm fairly certain they're an Oceanic dealer - IDK about Sherwood or Cressi:
Leisure Pro buyers find the best products at the lowest possible prices wherever they are. Since (sometimes) that means that we do not buy it directly from the manufacturer, nor are we authorized by them to sell their products, so we are not bound by the official/unofficial manufacturer's suggested retail prices, and we can pass on the tremendous savings to you. In some instances the product will come without an English language manual or manufacturer's warrantee cards valid in the United States. In those cases, we provide our own Leisure Pro Warranty, which offers equal or greater protection.
You might set a budget and define what you're looking for and the type of diving you plan to do - now and in the future and let people here make some suggestions. If you're like many of us, you'll replace everything a few years later with what you really need/want. So maybe it makes sense to get a better handle on what that is first.
Someone will likely post soon that a BP/W is the best solution for you also. It might be but evaluate that against your needs/desires also. It isn't for me.