Really Exagerated bass, high tempo moshing beat and something you dance better to when youre ****ed off your face than sober is a better way of putting it.. Try Tommyknocker, Age of Fighters, Scott Brown, A.M.D.A.
If you want anything that sounds half alright afraid youre gonna have to splash the cash a bit. Sequencers, i use Steinberg Cubase SX and Propellerhead reason 3.0 both cost a bit but have all the shit especially cubase. Have a dodgy copy of Acid Pro, FL studio 6 XXL and Logic Express though i wasnt keen on them..
Get yourself a decent keyboard or at least a MIDI control surface keyboard (Roland Juno G is on my wishlist but for now i just about get by with a bome soft midi controller linked by midiyoke virtual midi port and use the soft synths built into cubase and reason with a few aftermarket sound banks) if youre going the keyboard route after you decide you like making music then youl also need a MIDI/Audio interface to link your gear up.
As for scratching, some might disagree but i think the only thing that doesnt sound crap is real vinyl samples, used to use my old crappy stanton decks, they did the job. If youre after quality the go Technics. i got my eye on a set of technics 1210 SL mk5's in cash converters, you can pick up almost brand new ones from second hand shops for like half the price if you look around. If you really dont want to go analog then there are hardware midi turntables that you just spin the top of it and it simulates spinning up a record. Theres also VST plugins for your sequencers that do the same sort of thing just on your screen.
Also get yourself a half decent set of studio monitors. Computer speakers dont cut it. Also LEARN THE GEAR YOU BUY, nothing worse than going out on a mass spend up then get back and realise youre missing something or dont know how the **** to use it. Theres plenty of music production forums about but nothing beats being taught first hand how everything works. Really helps if you have friends already into it, i learnt so much more from that than forums.
It aint really something you can just sort of wake up one day and say "I WANNA BE A MUSIC PRODUCER TODAY!" it takes effort, a LOT of time and has a very steep learning curve. Best thing to do is find a trial version of an alright softsynth/sequencer and a software that lets you use your computer keyboard as a music keyboard like Bome's Mouse Keyboard and keep playing around with it untill youre sure you want to go serious..
If youre serious.. Like SERIOUS, then get in touch with me and ill help you sort out some starter gear..