GFO types

Does anyone have experience, or an opinion, with the different types of GFO offered by BRS? I've previously used the High Capacity GFO, but it's very expensive by comparison. I'm not sure how to gauge my need compared to the price.
Here is the description of GFO types from the BRS website:  
   GFO comes in three different types. 
   •Granular GFO is the same material as Pelletized GFO, but slightly smaller. It requires the least amount of flow to tumble. (Good for reactors) 
   •Pelletized GFO is essentially Granular GFO in pellet form. However, it's more uniform in shape and slightly harder which results in less dust
    and fines. (Lower dust) 
   •High Capacity GFO is twice as dense as Granular or Pelletized GFO so twice as much material will fit into a reactor. It's extremely hard and has 
    less dust to begin with. Fewer fines will be created during use and transportation. By volume High Capacity GFO will remove roughly twice the
    phosphate compared to Granular or Pelletized GFO. (Best overall performance)

 

Come on....someone has an opinion !!

 

I found several posts on Reef Central regarding various observations about the different BRS GFO.
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http://www.reefcentral.com/forums/showthread.php?t=1315804[/color=#800080 size=3 face]

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I ran some test regarding the duration and adsorption of granualr and pellets basically this is what I found:
a) Granular removed phosphate faster but degraded faster due to clumping, precipitation and channeling.
b) Pellet removed more total phosphate because it lasted longer (on one of my tests a batch lasted 8 months!)
c) Using up to three times the recommended dose, neither was detrimental to the corals in my system
d) Pellet was easier to rinse than granular which had a lot of fines.
e) Pellet clumped the least and got less carbonate precipitate. The explanation to this could be that a more uniform flow across the whole media bed is achieved with pellet. granular had more tendency to channel the flow so there was dead flow sections in the bed.

 

[color=#800080 size=3 face="Times New Roman"]http://archive.reefcentral.com/forums/showthread.php?t=1290649[/color=#800080 size=3 face]

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I had the oportunity to test compare pellet vs granules.
The main findings were:
   a) I was not able to test if the pellet loose less material or not than the granules but it is noticeable that pellets are easier to rinse and 
   have less fines than granules
   b) Pellets provided a better flow distribution troughout the media bed than granules, this seems to have reduced (but not eliminated) the 
   media tendency for clumping together due to calcium carbonate carbonate precipitation thus extending the useful life of the media allowing 
   for enough time for complete depletion.

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[color=#800080 size=3 face="Times New Roman"]http://www.reefcentral.com/forums/showthread.php?t=1672711[/color=#800080 size=3 face]

"i tend to use smaller amount gfo and gc and change more freaquant . 4 weeks max on gc and 6 weeks max gfo. i use tlf reactor gfo on the bottom sponge than gc on top with mj 400 .it seems to work pretty good gfo keeps nitrates and gc removes toxins . "
"I would stay away from the pellet for a reactor. The tumbling can be a problem.
If you are going to run it in a reactor, I would go with the HC. "
"I used the pellet . It was ok in the reactor; not much dust. Granular would be a problem. The hc is what I now use. Works well not much dust at all. "