If you're a new diver, I would suggest you buy only as you really need, and acquire the experience to get exactly what you want. As far as the reg goes, almost anything will work really well; there's ALOT of hype in regulator purchase for recreational diving. If your LDS sells aqualung and that appeals to you, try the titan; it's a lot less expensive and it will work as well. If you're not sure, just figure out some way to try several different regs on OW dives of moderate depth and you'll see exactly what I mean. All the regs you listed would serve you will, I'm sure. Sometimes it comes down to service availability and familiarity. The good news is that as long as you buy a reputable reg from a reputable dealer, you're almost certainly not going to get something you won't like, or at least be willing to use.
The wetsuit choice will have a much more noticable and immediate impact on your diving experience, and in this case, fit is everything. If your LDS can fit you correctly, you should probably buy it there, and I think a good, perfectly fitted wetsuit suitable for your local conditions is probably the best first purchase for new divers.
The BC is a very personal choice that requires diving experience to make. So, at the risk of inciting a riot, I'd suggest that you rent for a while, or if you must buy, really consider resale value; because probably you'll change your mind at some point. Everyone raves about the Zeagle brigade, and you'll have no trouble selling it for a good price if/when you decide to go a different route. Another option is to buy something used; there's a huge selection of BCs on ebay. That right there should tell you something about BCs; most divers will change their BC opinion throughout their development as a diver. But, fit is an issue, and you're always taking a chance with used stuff.
Computer purchase for a new diver is a little confusing to say the least. You might want to look over this:
http://www.scubadiving.com/gear/dive_computers/crunching_the_numbers/
Pay attention to the charts....sometimes there's a huge difference in the way different computers react to the same scenario. Unfortunately, as a new diver, it's very difficult for you to know which of these computers is the best fit for your diving style. Good luck! Don't forget the value of user-friendliness and ease of reading; in this aspect, the aeris atmos are really good. The conservative nature of Suunto computers has the respect of many of the more experienced divers on this board, but many of them are in more demanding diving situations where safety margins are smaller.