Personally, I quite enjoy using the 28/85 combo. The 28 is a lovely length, and I do like the fastness of it, so it's not the best optically, but it's good. While I'll accept 85/1.8 is an ancient lens, it's a good one mainly because I find the 100mm length a bit neither here nor there.
Well, as to 135mm replacements, I have a CZJ Sonnar f3.5, now it's totally different to the f2L but it has some of that Zeiss magic that a lot of people talk about, and while I know many of you will be dubious, but so was I until I actually used it, and no it's not expensive either.