Yeah, i see what you mean. Having 'both' would be much better. In fact, having only these two synths would pretty much cover every synth need one might have by the looks of it.
Tone 2's Elektra 2 synth looks like their do all end-game synth. I would choose Elektra 2 over Powersynth, i did not really like the presets that came with Powersynth and it did not seem to have a phat chunky sound, it almost seemed a bit too squeaky clean with an almost glassy tone many times.
The low-down on Elektra 2... "With an incredible selection of 14 different types of synthesis, Electra2 truly is the swiss army knife of synths. Its versatile synthesis engine can easily replace a studio filled with hardware. The synthesis types range from traditional ones like the classic Virtual Analog, Wavetable, Subtractive, Phase Distortion and FM synthesis, up to Physical Modeling, Ultra-saw, Vocoder, Sync, Ringmod, PWM, Noise, Wave-shaping and Tone2's exclusive Fractal synthesis."
"No synthesizer workstation would be complete without an excellent filter section, which is why each layer within Electra2 contains two multi-mode filters with 37 unique filter types, and 3 tone controls, as well as multi-mode distortions.
These filter types range from traditional analog filters like Moog Low Pass, High Pass and Bandpass, up to digital ones like Vocal, Phaser, Aliaser and Fractal filters. A large number of these filter types are exclusive to Tone2 and NOT AVAILABLE IN ANY OTHER PRODUCT."
"The filters are able to self-oscillate and to produce a wide range of timbres, allowing you to further sculpt your sound to perfection."