Whichever DAW you end up going for, make sure it has VST support. Reason is ok but it suffers due to lack of VSTs, Subtractor and Malmstrom are solid little synths and Thor is a beast, probably as good as NI Massive, but the problem is that when you've got a nice sound rolling you'll inevitable want to put some effects on it or do some EQing and this means bouncing down your audio and loading it into a separate program which can be a pain. I don't really like the reason compressors and I'm not a big fan of Scream either. (Distortion will be very important if you want to do jump up)
These problems are remedied if you get a rewire client however it still does mean flipping between windows and it can become a big drain on your system resources. Personally I use Cubase SX3, I have Reason 4 and use it occasionally but mainly just for knocking together ideas or having a bit of fun.
Cubase can be a bit overwelming for first-time users, (took me about 2 weeks to get a sound out of it when I first started), but I wouldn't use anything else now. I'm starting to ramble now so I'll just give you my essential list of jump up tools:
z3ta+
Brilliant little synth, you can practically get any sound you want out of it (presets are a bit naff though). Low memory usage so you can have 3 or 4 of them open with no problems.
Some sort of EQ
Essential for getting everything to fit together (especially drums). I use Waves REQ but there are plenty of freeware ones around.
Ohmicide
The most sickening distortion plugin that has ever growled in my ears. If you want to try and get sounds like 'Machete' or DJ Pleasure, you'll need this.
I'm tempted to say some sort of compressor, but they're very difficult to use when you're starting out and can end up ruining something that would've otherwise sounded alright. (Properly enveloped drum hits shouldn't really need much compression if they're mixed right)
Spectral Analyser
Useful tool to hunt down any pesky frequencies that are taking up valuable head room. Also useful when EQing drum hits, but don't become reliant on it, ears are better than eyes.
And finally...............GOOD SAMPLES
There's absolutely no point wasting you're time trying to make shit samples sound good, you can't polish a turd. If you've got good samples/breaks all they will need is chopping up, EQing and envelopes (maybe compression).
Spose that's about it really. I suppose I could just contradict myself by saying you don't have to give up on Reason altogether, alot of producers swear by it. Search youtube for some tutorial videos, Logistics did one, and he uses Reason.