I'm not sure you're going to be able to use BES with your company's Exchange Server. If the company doesn't support BES, it probably won't do you much good on the BB.
With Exchange Server and a Windows Mobile phone you get complete sync with Outlook. That's pretty much equivalent to how things work with BES. (Though BES still has a few "gotchas" sync'ing with Outlook.) Without BES, if you're looking for that kind of function, I believe you'll be out of luck. (I'm not sure when you say "wireless sync" if you're using VZW's wireless sync or just using ActiveSync, wirelessly -- which is far superior.)
There are some workarounds but none that I'm aware of will give you the ease and simplicity of what you're currently getting. I'm a former WM user who much prefers my BB, however if I didn't have access to BES, I'd still be with WM. (A rare opinion around these parts.