Apple Logic Pro /LogicExpress Discussion

I wonder if anybody are using the RME QS converters. They are quite expensive, are they as good as their price suggests. My studio is in pretty fine shape and anything but a top of the line industry standard (I use that term loosely) would be a bad idea to invest in.
I realise that there is another level of converters after the ones in the RME pricetag (ie Prism) that are twice (at least) as expensive. I am not interested in how terrific they are, RME QS is my limit. I prefer the ADAT interface and plan to buy the RME Raydat as well but it seems to me like there´s very little competition in the 24/192 hi end. 
Another thing I have noticed with the QS line is the very low internal latency (between 5 and 12 samples depending on the samplerate) which is half of the best I have tried myself and my current converters are about 3 times that.
The Apogee Symphony line has similar features (on all accounts) but not with ADAT and with 10% extra in expenses.
MOTU doesn´t seem to have anything quite like it at the moment.
Are there brands that I should take a look at before buying, I need 16 I/O in 96 KHz and I definitely don´t want to use more than one slot in the Mac.

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