What you are asking may be a bit tough to answer as nothing will really pair directly with your GHE 1000 speakers. The 3-way design using a 10" woofer tends to produce a full range sound which just doesn't match up with anything else. It can be a bit boomy in terms of sound, and will overpower most center channels and surrounds. But, you can adjust the A/V receiver typically to help it to blend with whatever speaker you end up pairing it to.
I think my recommendation would be that if you would like to have an upgradable system, that perhaps your focus should be on purchasing gear that will match for a better upgrade path instead of blending with what you have right now. Look for reviews on specific speakers you are considering, and go listen to them if you can.
Of the choices given, the ES25c seems like the better choice to match across your fronts.