
I think LSAs would be great with VR-1s, VR-2s, VR-4jrs and SR Mk1s and Mk2s. They are extremely close timbre wise to the aforementioned albeit less with the SRs. Your Annies however are so extended it's as though they have super tweeters. That's why I recommended the Dali in walls. The room tone on the surround tracks would be more seamless thanks to their ribbons. If LSA ever got around to making the equivalent of the LSA1 Statement in surround form, I'd have recommended them in a heartbeat. Unfortunately, they'd end up being in the Dali's price range as well.
Personally though I, like you, give more importance to the center channel. The sane route would be to follow your plan. Save up for the VisiUN which in my opinion is one of the best center speakers in the world bar none and actually get more affordable dipoles if you calibrate for THX specs in-walls or in-ceilings if you run straight up or DSP'ed Dolby Digital or DTS.