It is all about tradeoff's. If you want the smoothest sound in which neither VTA or noise is a necessary complication get a conical (can you?) or, to a lesser degree, an eliptical. If you want the last bit of detail (including the embedded noise) get a line stylus and deal with VTA and all of the other parameters. That is why elipticals are popular, they are a good compromise for the less than anal audiophile.
Actually this choice is no different than you face with most of the other issues in audio component selection, emphasis on detail vs smooth more assessible sound. Neither choice, when absolutely pursued throughtout the system, is going to be ideal.
Personally, I have always leaned toward a line stylus in a cartridge that tonally matched my system and looked past the noise issues. But thats me...:-)
Here is a thought, set up two turntables - one for your best LP's with little surface noise and a second turntable with a different cartridge/stylus for more ordinary LP's and have the best of both worlds. I did it for years. In fact I had a suspended table/an unsuspended table, a high mass arm/a low mass arm, a MM cartridge/a MC cartridge, a conical stylus/a line stylus. It was a lot of fun........:-)