Welcome,
Shboom pretty much asked what I wanted to ask. KNowing what your budget is will help us give you some useful advice.

Even without knowing your budget I can right away tell you that the most inexpensive way to get your hands on some good synths and sounds is to get some software synths and instruments. If you have a good computer that is fast enough that is. You will be able to do more and pay less.

Another way to approach this is to look for used synthesizers and sound modules. eBay and other on-line auctions are the best way to find those. Not the safest way however. Buying used gear is a tricky business full of surprises.


-ED-