As mentioned in a thread in the d pawn specials section, transposing to the Blumenfeld Gambit is a logical option: 1.d4 Nf6 2.Nf3 c5 3.d5 b5 4.c4 e6. White has some other 4th move options, especially 4.Bg5.
But it will be hard, to develop interesting play against the Colle and the London - an important reason for me to play the Dutch.
Depending on what you want to play against those solid Queen's Pawn Openings, you might also consider 2...e6 (idea 3...b6; 4...Bb7; and eventually Ne4 and f5) or 2...g6 (idea to play c5 only after White has played c4; but White can transpose to the English by not playing d4-d5).
It is not an easy choice.

As black I play 1...Nf6 in response to d4 and play the Budapest after 2 c4. If white plays 2 Nf3 instead of c4 I want to play the benoni but I don't know if I will receive a better or worse position than in the normal benoni.

Also, how should I try and combat ultra-solid systems like the Colle and London?