There is nothing new which can be directly compared with V700.
Depending from your budget and needs, people have success with:
1) Mackie MCU Pro (+ XT when required). Good for general mixing, transport, jogging and many other operations. Not so good for FXes. Will not controls SoftSynth nor ProChannel (except standard EQ/Comp)
2) Behringer X-Touch (big one, Behringer has released XT unit but no success/failure reports so far). The functionality is the same as MCU, the producer and so the components are different
3) Presonus Faderport. One strip controller (not Faderport 8!) with good fader. Special native Sonar support exist (some users prefer an alternative).
4) Avid (throw EUCON). Something works, I guess toward MCU functionality (but less).
For dedicated strip control (for own plug-ins):
5) Softube Console 1
Third party solutions:
6) Behringer BCR2000, Behringer X-Touch MINI. Both can control almost everything controllable in Sonar. Comparable with VS700 in functionality. But no faders.
7) For Soft Synth., dedicated controllers (NKS, VIP) are better. Note that they will not control Sonar mixing section.
8) MIDI keyboards with native Sonar support: Roland A and Nectar Impact. Not perfect for any particular activity, but can be used for basic operations.
9) everything with MIDI output can control Sonar. But configuring is DIY.