It's huge, practically impossible to program (+ you have to do it all from one slider at the front... and we're not talking subtractive synthesis here... this is a FM synth guys. algorythms.).
I sold mine and got a Juno-60. It's lush, the analog filters make the DCO's amazing, etc etc.
As for leads / basses the ultimate is the Korg MS-20... I guess I'm speaking generally here as it is far far far out of the price range. But it has a patch bay, the craziest filters ever and a THICK low end. So much fun to play.
roland gaia sh-01 is a nice idea, but it's built like a toy and sounds like one in most instances... might as well get a MicroKorg.
And as far as I can tell they are pricey. Shell out a couple extra hundred and cop a Roland SH-101 off the used market. I got a Roland MC-202 recently (UNDERRATED BEASTTT) and it's essentially a SH-101 with a TB-303 sequencer on it. and it runs on batteries.
I don't make dubstep, but if that's what you're trying to do, I'd go with the SH-101 if I were you. they go for like 650$.
or build a modular











or don't. It's a money pit. I love mine to death but jesus christ took like 4 months just to have enough parts to make it make a sound. but now I got my ARP filter clone and the heaviest oscillators around

/nerd