If you are looking all-in-one solution than what about Dirtywave M8? It is twice cheaper than AR or OT. It is very logical and easy to use. It has 4 synth engines (macrosynth – port of MI Braids module with big mount of different types of synth engines, 4-op fm synth with different waveforms, wavesynth – 8-bit synth, hypersynth – 13 osc polyphonic synth), sampler – supports samples of any length (streams directly from sd) and can play them in a any directions including special OSC mod for using with wavetables files (sounds fat). You can easily slice samples, record samples via line in port or usb, you can use it as a midi/usb-midi sequencer with parameter locks. It can stream screen and sound via USB port. It has parameter and sound locks on each steps. Effects (chorus, delay, reverb) sounds very nice and also can be parameter locked. Multi-mode filter is a part of sound engine and it is available for all instruments (in OT filter is an effect and occupies 1 of 2 fx slots). Great little device for any genre of music. I highly recommend you to take a look at it.