Hey,
Think of it like this:
Q. If you need a vehicle to drive your family (which has your wife, 3 kids and a dog) from Bonn to London, would you buy Schumacher's F1 Ferrari car?
A. No
Q. But why not? That F1 must be one of the most expensive cars out there! I thought 'more expensive = better"!
A. Maybe so, but there's only room for one person in an F1 car, it doesn't take regular petrol, and they are not suitable for driving on normal roads.
My point is that some cards come with lots of features that you have to pay for that you don't need, or else it isn't designed to do what you need a card to do.
Example: word clock, multiple ins and outs, ADAT, AES-EBU, SPDIF, TDIF, SMPTE, etc. You would probably never need any of these things if all you do is use Reason in your small bedroom studio, but if you buy a Lynx One card for $500 you'll be getting a lot of that extra stuff...you could just as easily get an Echo Mia for $170 and it will do exactly what you need without all the extra bells and whistles.
Take care,
Nick