Hi Marlowe
I'm afraid that I can't really suggest any seperate EQ or reverb mods, as I'm on a windows setup. Unfortunately, there's no other advice I can offer, other than spending a little time getting to know each sound set individually. With samples you have to be a little bit of each musician as well as composer. The benifits from any care and hard work, are though, greatly
rewarded.
I do remember one of the tutorial videos on the VSL site for logic. It dealt with the send and returns on the inbuilt reverb.
I use a similar method in cubase with a great little reverb on default setting. The send and returns really allow seperate control over each instrument.
Keep up the good work.