Have a look for a few decent modular synths if you are into that thing.
Try Komplete 7 if you havent got it.
Absynth is better than sliced bread
Absynth is the fucking cat's meow! I love it, it's really confusing to get into at first but once you understand the basics, you'll realize what a joy it is to work with! It even comes with a FUCKING HUGE bank of presets for if you just want a quick sound, especially after the most recent update in which they've included 2 banks that you previously had to pay for. It can run as an effect mode too!
/advert
I'd also recommend you try PSP VintageWarmer, it sounds amazing (and is at the top of my xmas list) and you'll see a lot of the big producers using it in their masterclass vids.
I don't have a serious list of stuff that I've purchased, just a handful of plugs, don't underestimate the power of freeware plugs either. Sometimes you can be surprised!
---------- Post added at 07:40 ---------- Previous post was at 07:39 ----------
i have absynth already.might try get komplete 7/8 but i feel its just too expensive.is it possible to just get razor?
Yes it is, it runs in Reaktor Player, the draw back is that you can't save patches interally to Reaktor. However you are using Logic so you can save the patch to Logics patch list (sneaky workaround!).
Razor also comes highly reccomended, but to be honest I don't really use it for basses all that much (which is what most people buy it for?)