SIO2SD questions and comparison with SIDE2

Hey everyone,
Looking at getting a flash cart for my XEGS system.
I am thinking of getting a SIO2SD but cannot find a strange answer to its compatibility with the XEGS.  Will it work ok?
Is it easy to navigate through the different folders etc using the LCD display?

I also saw the SIDE2 Cart from the same seller and was interested in that one also.  Do I need any expansions or anything for this to work  with the XEGS?  I think I need the 1mb expansion the same seller has.

What is everyones opinion on what the best option is?  I basically want to just play compatible games for my system.

I have emailed the seller but have not receieved an response as of yet.

Thanks