Ikea Expedit or Besta Enon weight capacity?

I would like to buy either the Ikea Expedit TV Storage Unit or the Besta Enon TV Storage Unit to hold a 37" LCD, but I would like to see if anyone else has any experience with these first.
My questions are:
1) Can they indeed hold the max weight of 110 lbs on the back panel? I have had good experience with the Markor shelving and Ektorp couches - but I have used any AV stands. Ikea does use a lot of MDF/particleboard and I don't know about that holding a TV.
2) The Expedit doesn't actually list a weight limit at all for the TV back panel - I'm assuming it would be the same as the Besta but of course that's just an assumption. Ikea live chat and by phone has not been able to help me.
3) Has anyone had trouble actually mounting the TV on these?

Thanks so much for any help - I really appreciate it!