[Leica] Recent Leica 90/2.8 - Seeking Comments and Advice

[scott at adrenaline.com (Scott McLoughlin)]

I'm idly thinking about some gear additions and
enhancements I might make early next year. Right
now, I have some lenses between 21mm and 50mm.
With the recent addition of the 28 Summicron, I
think I'm pretty content in this  range.

So I'm putting out feelers for a longer lens. Right
now, the 90/2.8 looks enticing.  Not too big, built
in convenient shade, pricey but not way too pricey,
E46 filters like my 28/2.

Any issues regarding the 90/2.8?  Any "better" options
I should consider?  Should I wait for the Zeiss 85mm
and see how she performs?  Any other size, weight,
speed tradeoffs I should consider?

Should I spring for the 1.25x magnfier to use this lens
on my M6 w/.72 finder?

Right now I shoot a few short teles on my Nikon FM3a:
85/1.8, 105/2.5 and 135/2.8.   So this will be my first foray
into shooting a longer lens on my Leica.

Thanks for any advice.

Scott