What current offering most fits that "weighs and performs really similarly to a red dot"? My mind goes to the accupoint series due to lower weight and unlimited illumination (but frankly I don't know s**t about LPVOs)
Ok, here's the problem...
From my experience, for a standard weight carbine (before you start adding cans and MAWLs and shit), the literal tipping point for balance with an LPVO is somewhere around 19-20ish ounces pending mount weight and minor differences in barrel length/profile/construction. This is why many are happy with a 16.9oz Kahles or 17oz NF NX8 (or even that little 14.5 oz 1-4 Accupoint) as it still maintains a reasonably balanced (not top-heavy) rifle. 21-24oz optics (especially if you raise up in a higher mount) can feel off-balanced to some and why many will opt to pair this with a heavier rifle like an SPR, SR25, or something that's already a pig like the 416/MR556. This is all minutiae and by all means not rules. Dudes who know what they want obviously put up with a few more ounces for various capabilities. These are just general trends I've seen with guys new to LPVO's in terms of weight and their perceptions of handling.
The rub is that optic capability is largely dependent on magnification range and illumination/reticle usability. Obviously, magnification is a factor in size (thus affecting weight). The NX8 is proof that there are trade-offs to scaling things down in terms of tube size/length...at least at this point in time.
The other factor is what mechanics are used to obtain whatever dot/illumination the scope has.
The Accupoint mentioned uses tritium and fiber optics that are obviously light
The Razor HD 1-6 uses a combination wire reticle in conjunction with illuminated fiber optics (but their overall construction is generally heavy for their class)
Most Schmidt & Benders basically use the same tech as Aimpoint and you have a mini red dot crammed into the optic...and obviously this tech is more expensive obviously
And then you have varying degrees of hi-power illumination on etched reticles on things like the CQBSS H27D, Nightforce, and I believe the new Vortex 1-10 and the Kahles
Each one has their pro's and con's in terms of weight, reliability and practical functionality.