Arturia, definitely; you can do lots of tweaking.
Wait…
• Unless you want fuller, richer, more dynamic, more authentic sound… then Syntronik 2.
• Unless you want a consistent and larger, more comprehensive set of effects… then Syntronik 2.
• Unless you want 4 preset/instrument layering; with independent arp/sequencer, full effects, midi control (PB, mod wheel, sustain, aftertouch) filtering, keyboard range, velocity range, and tuning per layer… then Syntronik 2.
• Unless you want a significantly lower price; especially with the current amazing group buy pricing… then Syntronik 2.
• Unless you want sounds from more classic synths… then Syntronik 2.
• Unless you want the choice of 7 filters (including circuit-level models of 4 well-known classics) per instrument preset… then Syntronik 2.
Yeah, otherwise Arturia, especially if you want pianos and organs.
I own and love Arturia, especially Pigments. But when it comes to rich, full, authentic sound, IMHO many of those Syntronik 2 sounds just can't be beat.
Note: The preceding opinion is mine; go get your own! Download the free Syntronik 2 and give it a test. Or, at least go to the Syntronik 2 webpage and listen (on a good set of speakers or headphones) to the audio demos - the overview ones for Syntronik 2 as well as the ones for the individual Syntronik 2 synths. And check out the currenly available (limited time) amazing Group Buy - up to all 33 (currently 24) Syntronik 2 synths for the price of one ($49.99, or about $35 if you have IK Multimedia 'Jam Points').